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Riding a bike is a good way to get close to the "put in". It's also good when parking is limited or nonexistent.
Rollin' with Runar - animoto.com/play/SAGHcN8jevUNuYBNWb1xlg
Natalia Younan (pink), a wildlife and fish coservation major, gather the sex of the Red Eat Slider for Sidney Woodruff's research in the Arboretum on June 8, 2022.
The project involves assisting Dr. Brian Todd and Ph.D. Student Sidney Woodruff in a research study evaluating how native species respond to the removal of non-native species and waterway restoration. The research objectives are to investigate the abundance and population demography of the native Western pond turtle (Actineymys marmorata) and population response in growth and demography from the removal of non-native red-eared sliders. Natural populations of the Western pond turtle are found in the UC Davis Arboretum where red-eared sliders occupy the same ecological niche in high densities. Natural populations of Western pond turtles are found in the nearby South Fork of Putah Creek where the presence of non-native turtles is extremely low or nonexistent. This work can highlight the importance of waterway restoration in building a more resilient ecosystem while supporting the recovery and conservation of native species.
Providing this opportunity will allow undergraduate students to be involved in wildlife conservation research under the supervision of a graduate student mentor and PI while also supporting the objectives of this study and the restoration of the UC Davis Arboretum.
Mendon Ponds Park is owned and very poorly maintained by the County of Monroe, NY.
Unfortunately, this extraordinary property is rapidly deteriorating due to an egregious lack of care. Trails are not cleared of debris... signs are useless. Park maintenance is essentially nonexistent. They do have a marketing department. Seriously, the taxpayers are paying the salaries of a county parks marketing department.
Email Mendon Ponds Park complaints to: countyexecutive@monroecounty.gov
Leeville, Louisiana
on Bayou LaFourche
LaFourche Parish
Some of the greatest fishing is right here.
Leeville was settled by flood victims. On October 1, 1893, a hurricane wiped out the area's main settlement, Caminadaville, which sat on a spit of land bordered on three sides by the Gulf and on the fourth by swamp. Nearly half of Caminadaville's inhabitants perished in the storm, most by drowning, some when the buildings they had taken refuge in collapsed.
Survivors sailed up the bayou in their damaged canots and began buying land from an orange-grower named Peter Lee, who was selling plots for $12.50 each. For sixteen years, they fished, planted rice, and held fais do-do dancing parties in homes with covered verandas.
Then, in 1909, the Leeville Hurricane struck. (A contemporary newspaper account described survivors of that storm subsisting on drowned rabbit.) Six years later, a third hurricane forced residents to flee north once more. According to local legend, the storm surge carried one house from Leeville nine miles inland. The owner simply bought the plot underneath it and moved back in.
In the nineteen-thirties, Leeville rebounded briefly. Oil was discovered in the area, and by the end of the decade there were ninety-eight producing wells in town. The pay was good and regulation nonexistent. Blowouts routinely rained sulfur and brine onto the houses, into the cisterns, over the trees. Tin roofs corroded and vegetable gardens shrivelled up. When the wells ran dry, oil production moved offshore and Leeville was again deserted.
There were no more jobs, and the town itself had begun to wash away. Where once men in straw hats picked oranges and harvested rice, today there is mostly open water.
from: www.accessmylibrary.com/coms2/summary_0286-15339115_ITM
Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads (cranial kinesis). To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca. Lizards have independently evolved elongate bodies without limbs or with greatly reduced limbs at least twenty-five times via convergent evolution, leading to many lineages of legless lizards. These resemble snakes, but several common groups of legless lizards have eyelids and external ears, which snakes lack, although this rule is not universal (see Amphisbaenia, Dibamidae, and Pygopodidae).
Living snakes are found on every continent except Antarctica, and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, the Hawaiian archipelago, and the islands of New Zealand, as well as many small islands of the Atlantic and central Pacific oceans. Additionally, sea snakes are widespread throughout the Indian and Pacific oceans. Around thirty families are currently recognized, comprising about 520 genera and about 3,900 species. They range in size from the tiny, 10.4 cm-long (4.1 in) Barbados threadsnake to the reticulated python of 6.95 meters (22.8 ft) in length. The fossil species Titanoboa cerrejonensis was 12.8 meters (42 ft) long. Snakes are thought to have evolved from either burrowing or aquatic lizards, perhaps during the Jurassic period, with the earliest known fossils dating to between 143 and 167 Ma ago. The diversity of modern snakes appeared during the Paleocene epoch (c. 66 to 56 Ma ago, after the Cretaceous–Paleogene extinction event). The oldest preserved descriptions of snakes can be found in the Brooklyn Papyrus.
Most species of snake are nonvenomous and those that have venom use it primarily to kill and subdue prey rather than for self-defense. Some possess venom that is potent enough to cause painful injury or death to humans. Nonvenomous snakes either swallow prey alive or kill by constriction.
Etymology
The English word snake comes from Old English snaca, itself from Proto-Germanic *snak-an- (cf. Germanic Schnake 'ring snake', Swedish snok 'grass snake'), from Proto-Indo-European root *(s)nēg-o- 'to crawl to creep', which also gave sneak as well as Sanskrit nāgá 'snake'. The word ousted adder, as adder went on to narrow in meaning, though in Old English næddre was the general word for snake. The other term, serpent, is from French, ultimately from Indo-European *serp- 'to creep', which also gave Ancient Greek ἕρπω (hérpō) 'I crawl' and Sanskrit sarpá ‘snake’.
The fossil record of snakes is relatively poor because snake skeletons are typically small and fragile making fossilization uncommon. Fossils readily identifiable as snakes (though often retaining hind limbs) first appear in the fossil record during the Cretaceous period. The earliest known true snake fossils (members of the crown group Serpentes) come from the marine simoliophiids, the oldest of which is the Late Cretaceous (Cenomanian age) Haasiophis terrasanctus from the West Bank, dated to between 112 and 94 million years old.
Based on comparative anatomy, there is consensus that snakes descended from lizards. Pythons and boas—primitive groups among modern snakes—have vestigial hind limbs: tiny, clawed digits known as anal spurs, which are used to grasp during mating The families Leptotyphlopidae and Typhlopidae also possess remnants of the pelvic girdle, appearing as horny projections when visible.
Front limbs are nonexistent in all known snakes. This is caused by the evolution of their Hox genes, controlling limb morphogenesis. The axial skeleton of the snakes' common ancestor, like most other tetrapods, had regional specializations consisting of cervical (neck), thoracic (chest), lumbar (lower back), sacral (pelvic), and caudal (tail) vertebrae. Early in snake evolution, the Hox gene expression in the axial skeleton responsible for the development of the thorax became dominant. As a result, the vertebrae anterior to the hindlimb buds (when present) all have the same thoracic-like identity (except from the atlas, axis, and 1–3 neck vertebrae). In other words, most of a snake's skeleton is an extremely extended thorax. Ribs are found exclusively on the thoracic vertebrae. Neck, lumbar and pelvic vertebrae are very reduced in number (only 2–10 lumbar and pelvic vertebrae are present), while only a short tail remains of the caudal vertebrae. However, the tail is still long enough to be of important use in many species, and is modified in some aquatic and tree-dwelling species.
Many modern snake groups originated during the Paleocene, alongside the adaptive radiation of mammals following the extinction of (non-avian) dinosaurs. The expansion of grasslands in North America also led to an explosive radiation among snakes. Previously, snakes were a minor component of the North American fauna, but during the Miocene, the number of species and their prevalence increased dramatically with the first appearances of vipers and elapids in North America and the significant diversification of Colubridae (including the origin of many modern genera such as Nerodia, Lampropeltis, Pituophis, and Pantherophis).
Fossils
There is fossil evidence to suggest that snakes may have evolved from burrowing lizards, during the Cretaceous Period. An early fossil snake relative, Najash rionegrina, was a two-legged burrowing animal with a sacrum, and was fully terrestrial. One extant analog of these putative ancestors is the earless monitor Lanthanotus of Borneo (though it also is semiaquatic). Subterranean species evolved bodies streamlined for burrowing, and eventually lost their limbs. According to this hypothesis, features such as the transparent, fused eyelids (brille) and loss of external ears evolved to cope with fossorial difficulties, such as scratched corneas and dirt in the ears. Some primitive snakes are known to have possessed hindlimbs, but their pelvic bones lacked a direct connection to the vertebrae. These include fossil species like Haasiophis, Pachyrhachis and Eupodophis, which are slightly older than Najash.
This hypothesis was strengthened in 2015 by the discovery of a 113-million-year-old fossil of a four-legged snake in Brazil that has been named Tetrapodophis amplectus. It has many snake-like features, is adapted for burrowing and its stomach indicates that it was preying on other animals. It is currently uncertain if Tetrapodophis is a snake or another species, in the squamate order, as a snake-like body has independently evolved at least 26 times. Tetrapodophis does not have distinctive snake features in its spine and skull. A study in 2021 places the animal in a group of extinct marine lizards from the Cretaceous period known as dolichosaurs and not directly related to snakes.
An alternative hypothesis, based on morphology, suggests the ancestors of snakes were related to mosasaurs—extinct aquatic reptiles from the Cretaceous—forming the clade Pythonomorpha. According to this hypothesis, the fused, transparent eyelids of snakes are thought to have evolved to combat marine conditions (corneal water loss through osmosis), and the external ears were lost through disuse in an aquatic environment. This ultimately led to an animal similar to today's sea snakes. In the Late Cretaceous, snakes recolonized land, and continued to diversify into today's snakes. Fossilized snake remains are known from early Late Cretaceous marine sediments, which is consistent with this hypothesis; particularly so, as they are older than the terrestrial Najash rionegrina. Similar skull structure, reduced or absent limbs, and other anatomical features found in both mosasaurs and snakes lead to a positive cladistical correlation, although some of these features are shared with varanids.
Genetic studies in recent years have indicated snakes are not as closely related to monitor lizards as was once believed—and therefore not to mosasaurs, the proposed ancestor in the aquatic scenario of their evolution. However, more evidence links mosasaurs to snakes than to varanids. Fragmented remains found from the Jurassic and Early Cretaceous indicate deeper fossil records for these groups, which may potentially refute either hypothesis.
Genetic basis of snake evolution
Main article: Limb development
Both fossils and phylogenetic studies demonstrate that snakes evolved from lizards, hence the question became which genetic changes led to limb loss in the snake ancestor. Limb loss is actually very common in extant reptiles and has happened dozens of times within skinks, anguids, and other lizards.
In 2016, two studies reported that limb loss in snakes is associated with DNA mutations in the Zone of Polarizing Activity Regulatory Sequence (ZRS), a regulatory region of the sonic hedgehog gene which is critically required for limb development. More advanced snakes have no remnants of limbs, but basal snakes such as pythons and boas do have traces of highly reduced, vestigial hind limbs. Python embryos even have fully developed hind limb buds, but their later development is stopped by the DNA mutations in the ZRS.
Distribution
There are about 3,900 species of snakes, ranging as far northward as the Arctic Circle in Scandinavia and southward through Australia. Snakes can be found on every continent except Antarctica, as well as in the sea, and as high as 16,000 feet (4,900 m) in the Himalayan Mountains of Asia. There are numerous islands from which snakes are absent, such as Ireland, Iceland, and New Zealand (although New Zealand's northern waters are infrequently visited by the yellow-bellied sea snake and the banded sea krait).
Taxonomy
All modern snakes are grouped within the suborder Serpentes in Linnean taxonomy, part of the order Squamata, though their precise placement within squamates remains controversial.
The two infraorders of Serpentes are Alethinophidia and Scolecophidia. This separation is based on morphological characteristics and mitochondrial DNA sequence similarity. Alethinophidia is sometimes split into Henophidia and Caenophidia, with the latter consisting of "colubroid" snakes (colubrids, vipers, elapids, hydrophiids, and atractaspids) and acrochordids, while the other alethinophidian families comprise Henophidia. While not extant today, the Madtsoiidae, a family of giant, primitive, python-like snakes, was around until 50,000 years ago in Australia, represented by genera such as Wonambi.
There are numerous debates in the systematics within the group. For instance, many sources classify Boidae and Pythonidae as one family, while some keep the Elapidae and Hydrophiidae (sea snakes) separate for practical reasons despite their extremely close relation.
Recent molecular studies support the monophyly of the clades of modern snakes, scolecophidians, typhlopids + anomalepidids, alethinophidians, core alethinophidians, uropeltids (Cylindrophis, Anomochilus, uropeltines), macrostomatans, booids, boids, pythonids and caenophidians.
Legless lizards
Main article: Legless lizard
While snakes are limbless reptiles, evolved from (and grouped with) lizards, there are many other species of lizards that have lost their limbs independently but which superficially look similar to snakes. These include the slowworm and glass snake.
Other serpentine tetrapods that are unrelated to snakes include caecilians (amphibians), amphisbaenians (near-lizard squamates), and the extinct aistopods (amphibians).
Biology
The now extinct Titanoboa cerrejonensis was 12.8 m (42 ft) in length. By comparison, the largest extant snakes are the reticulated python, measuring about 6.95 m (22.8 ft) long, and the green anaconda, which measures about 5.21 m (17.1 ft) long and is considered the heaviest snake on Earth at 97.5 kg (215 lb).
At the other end of the scale, the smallest extant snake is Leptotyphlops carlae, with a length of about 10.4 cm (4.1 in). Most snakes are fairly small animals, approximately 1 m (3.3 ft) in length.
Perception
Pit vipers, pythons, and some boas have infrared-sensitive receptors in deep grooves on the snout, allowing them to "see" the radiated heat of warm-blooded prey. In pit vipers, the grooves are located between the nostril and the eye in a large "pit" on each side of the head. Other infrared-sensitive snakes have multiple, smaller labial pits lining the upper lip, just below the nostrils.
A snake tracks its prey using smell, collecting airborne particles with its forked tongue, then passing them to the vomeronasal organ or Jacobson's organ in the mouth for examination. The fork in the tongue provides a sort of directional sense of smell and taste simultaneously. The snake's tongue is constantly in motion, sampling particles from the air, ground, and water, analyzing the chemicals found, and determining the presence of prey or predators in the local environment. In water-dwelling snakes, such as the anaconda, the tongue functions efficiently underwater.
The underside of a snake is very sensitive to vibration, allowing the snake to detect approaching animals by sensing faint vibrations in the ground. Despite the lack of outer ears, they are also able to detect airborne sounds.
Snake vision varies greatly between species. Some have keen eyesight and others are only able to distinguish light from dark, but the important trend is that a snake's visual perception is adequate enough to track movements. Generally, vision is best in tree-dwelling snakes and weakest in burrowing snakes. Some have binocular vision, where both eyes are capable of focusing on the same point, an example of this being the Asian vine snake. Most snakes focus by moving the lens back and forth in relation to the retina. Diurnal snakes have round pupils and many nocturnal snakes have slit pupils. Most species possess three visual pigments and are probably able to see two primary colors in daylight. The annulated sea snake and the genus Helicops appears to have regained much of their color vision as an adaption to the marine environment they live in. It has been concluded that the last common ancestors of all snakes had UV-sensitive vision, but most snakes that depend on their eyesight to hunt in daylight have evolved lenses that act like sunglasses for filtering out the UV-light, which probably also sharpens their vision by improving the contrast.
Skin
The skin of a snake is covered in scales. Contrary to the popular notion of snakes being slimy (because of possible confusion of snakes with worms), snakeskin has a smooth, dry texture. Most snakes use specialized belly scales to travel, allowing them to grip surfaces. The body scales may be smooth, keeled, or granular. The eyelids of a snake are transparent "spectacle" scales, also known as brille, which remain permanently closed.
The shedding of scales is called ecdysis (or in normal usage, molting or sloughing). Snakes shed the complete outer layer of skin in one piece. Snake scales are not discrete, but extensions of the epidermis—hence they are not shed separately but as a complete outer layer during each molt, akin to a sock being turned inside out.
Snakes have a wide diversity of skin coloration patterns which are often related to behavior, such as the tendency to have to flee from predators. Snakes that are at a high risk of predation tend to be plain, or have longitudinal stripes, providing few reference points to predators, thus allowing the snake to escape without being noticed. Plain snakes usually adopt active hunting strategies, as their pattern allows them to send little information to prey about motion. Blotched snakes usually use ambush-based strategies, likely because it helps them blend into an environment with irregularly shaped objects, like sticks or rocks. Spotted patterning can similarly help snakes to blend into their environment.
The shape and number of scales on the head, back, and belly are often characteristic and used for taxonomic purposes. Scales are named mainly according to their positions on the body. In "advanced" (Caenophidian) snakes, the broad belly scales and rows of dorsal scales correspond to the vertebrae, allowing these to be counted without the need for dissection.
Molting
Molting (or "ecdysis") serves a number of purposes. It allows old, worn skin to be replaced and it can remove parasites such as mites and ticks that live in the skin. It has also been observed in snakes that molting can be synced to mating cycles. Shedding skin can release pheromones and revitalize color and patterns of the skin to increase attraction of mates. Renewal of the skin by molting supposedly allows growth in some animals such as insects, but this has been disputed in the case of snakes.
Molting occurs periodically throughout the life of a snake. Before each molt, the snake stops eating and often hides or moves to a safe place. Just before shedding, the skin becomes dull and dry looking and the snake's eyes turn cloudy or blue-colored. The inner surface of the old skin liquefies, causing it to separate from the new skin beneath it. After a few days, the eyes become clear and the snake "crawls" out of its old skin, which splits close to the snake's mouth. The snake rubs its body against rough surfaces to aid in the shedding of its old skin. In many cases, the cast skin peels backward over the body from head to tail in one piece, like pulling a sock off inside-out, revealing a new, larger, brighter layer of skin which has formed underneath.
A young snake that is still growing may shed its skin up to four times a year, but an older snake may shed only once or twice a year. The discarded skin carries a perfect imprint of the scale pattern, so it is usually possible to identify the snake from the cast skin if it is reasonably intact. This periodic renewal has led to the snake being a symbol of healing and medicine, as pictured in the Rod of Asclepius.
Scale counts can sometimes be used to identify the sex of a snake when the species is not distinctly sexually dimorphic. A probe is fully inserted into the cloaca, marked at the point where it stops, then removed and measured against the subcaudal scales. The scalation count determines whether the snake is a male or female, as the hemipenes of a male will probe to a different depth (usually longer) than the cloaca of a female.
Skeleton
The skeletons of snakes are radically different from those of most other reptiles (as compared with the turtle here, for example), consisting almost entirely of an extended ribcage.
The skeleton of most snakes consists solely of the skull, hyoid, vertebral column, and ribs, though henophidian snakes retain vestiges of the pelvis and rear limbs.
The skull consists of a solid and complete neurocranium, to which many of the other bones are only loosely attached, particularly the highly mobile jaw bones, which facilitate manipulation and ingestion of large prey items. The left and right sides of the lower jaw are joined only by a flexible ligament at the anterior tips, allowing them to separate widely, and the posterior end of the lower jaw bones articulate with a quadrate bone, allowing further mobility. The mandible and quadrate bones can pick up ground-borne vibrations; because the sides of the lower jaw can move independently of one another, a snake resting its jaw on a surface has sensitive stereo auditory perception, used for detecting the position of prey. The jaw–quadrate–stapes pathway is capable of detecting vibrations on the angstrom scale, despite the absence of an outer ear and the lack of an impedance matching mechanism—provided by the ossicles in other vertebrates—for receiving vibrations from the air.
The hyoid is a small bone located posterior and ventral to the skull, in the 'neck' region, which serves as an attachment for the muscles of the snake's tongue, as it does in all other tetrapods.
The vertebral column consists of between 200 and 400 vertebrae, or sometimes more. The body vertebrae each have two ribs articulating with them. The tail vertebrae are comparatively few in number (often less than 20% of the total) and lack ribs. The vertebrae have projections that allow for strong muscle attachment, enabling locomotion without limbs.
Caudal autotomy (self-amputation of the tail), a feature found in some lizards, is absent in most snakes. In the rare cases where it does exist in snakes, caudal autotomy is intervertebral (meaning the separation of adjacent vertebrae), unlike that in lizards, which is intravertebral, i.e. the break happens along a predefined fracture plane present on a vertebra.
In some snakes, most notably boas and pythons, there are vestiges of the hindlimbs in the form of a pair of pelvic spurs. These small, claw-like protrusions on each side of the cloaca are the external portion of the vestigial hindlimb skeleton, which includes the remains of an ilium and femur.
Snakes are polyphyodonts with teeth that are continuously replaced
Snakes and other non-archosaur (crocodilians, dinosaurs + birds and allies) reptiles have a three-chambered heart that controls the circulatory system via the left and right atrium, and one ventricle. Internally, the ventricle is divided into three interconnected cavities: the cavum arteriosum, the cavum pulmonale, and the cavum venosum. The cavum venosum receives deoxygenated blood from the right atrium and the cavum arteriosum receives oxygenated blood from the left atrium. Located beneath the cavum venosum is the cavum pulmonale, which pumps blood to the pulmonary trunk.
The snake's heart is encased in a sac, called the pericardium, located at the bifurcation of the bronchi. The heart is able to move around, owing to the lack of a diaphragm; this adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus. The spleen is attached to the gall bladder and pancreas and filters the blood. The thymus, located in fatty tissue above the heart, is responsible for the generation of immune cells in the blood. The cardiovascular system of snakes is unique for the presence of a renal portal system in which the blood from the snake's tail passes through the kidneys before returning to the heart.
The vestigial left lung is often small or sometimes even absent, as snakes' tubular bodies require all of their organs to be long and thin.[71] In the majority of species, only one lung is functional. This lung contains a vascularized anterior portion and a posterior portion that does not function in gas exchange. This 'saccular lung' is used for hydrostatic purposes to adjust buoyancy in some aquatic snakes and its function remains unknown in terrestrial species. Many organs that are paired, such as kidneys or reproductive organs, are staggered within the body, one located ahead of the other.
Snakes have no lymph nodes.
Venom
Cobras, vipers, and closely related species use venom to immobilize, injure, or kill their prey. The venom is modified saliva, delivered through fangs. The fangs of 'advanced' venomous snakes like viperids and elapids are hollow, allowing venom to be injected more effectively, and the fangs of rear-fanged snakes such as the boomslang simply have a groove on the posterior edge to channel venom into the wound. Snake venoms are often prey-specific, and their role in self-defense is secondary.
Venom, like all salivary secretions, is a predigestant that initiates the breakdown of food into soluble compounds, facilitating proper digestion. Even nonvenomous snakebites (like any animal bite) cause tissue damage.
Certain birds, mammals, and other snakes (such as kingsnakes) that prey on venomous snakes have developed resistance and even immunity to certain venoms.Venomous snakes include three families of snakes, and do not constitute a formal taxonomic classification group.
The colloquial term "poisonous snake" is generally an incorrect label for snakes. A poison is inhaled or ingested, whereas venom produced by snakes is injected into its victim via fangs. There are, however, two exceptions: Rhabdophis sequesters toxins from the toads it eats, then secretes them from nuchal glands to ward off predators; and a small unusual population of garter snakes in the US state of Oregon retains enough toxins in their livers from ingested newts to be effectively poisonous to small local predators (such as crows and foxes).
Snake venoms are complex mixtures of proteins, and are stored in venom glands at the back of the head. In all venomous snakes, these glands open through ducts into grooved or hollow teeth in the upper jaw. The proteins can potentially be a mix of neurotoxins (which attack the nervous system), hemotoxins (which attack the circulatory system), cytotoxins (which attack the cells directly), bungarotoxins (related to neurotoxins, but also directly affect muscle tissue), and many other toxins that affect the body in different ways. Almost all snake venom contains hyaluronidase, an enzyme that ensures rapid diffusion of the venom.
Venomous snakes that use hemotoxins usually have fangs in the front of their mouths, making it easier for them to inject the venom into their victims. Some snakes that use neurotoxins (such as the mangrove snake) have fangs in the back of their mouths, with the fangs curled backwards. This makes it difficult both for the snake to use its venom and for scientists to milk them. Elapids, however, such as cobras and kraits are proteroglyphous—they possess hollow fangs that cannot be erected toward the front of their mouths, and cannot "stab" like a viper. They must actually bite the victim.
It has been suggested that all snakes may be venomous to a certain degree, with harmless snakes having weak venom and no fangs. According to this theory, most snakes that are labelled "nonvenomous" would be considered harmless because they either lack a venom delivery method or are incapable of delivering enough to endanger a human. The theory postulates that snakes may have evolved from a common lizard ancestor that was venomous, and also that venomous lizards like the gila monster, beaded lizard, monitor lizards, and the now-extinct mosasaurs, may have derived from this same common ancestor. They share this "venom clade" with various other saurian species.
Venomous snakes are classified in two taxonomic families:
Elapids – cobras including king cobras, kraits, mambas, Australian copperheads, sea snakes, and coral snakes.
Viperids – vipers, rattlesnakes, copperheads/cottonmouths, and bushmasters.
There is a third family containing the opistoglyphous (rear-fanged) snakes (as well as the majority of other snake species):
Colubrids – boomslangs, tree snakes, vine snakes, cat snakes, although not all colubrids are venomous.
Reproduction
Although a wide range of reproductive modes are used by snakes, all employ internal fertilization. This is accomplished by means of paired, forked hemipenes, which are stored, inverted, in the male's tail. The hemipenes are often grooved, hooked, or spined—designed to grip the walls of the female's cloaca. The clitoris of the female snake consists of two structures located between the cloaca and the scent glands.
Most species of snakes lay eggs which they abandon shortly after laying. However, a few species (such as the king cobra) construct nests and stay in the vicinity of the hatchlings after incubation. Most pythons coil around their egg-clutches and remain with them until they hatch. A female python will not leave the eggs, except to occasionally bask in the sun or drink water. She will even "shiver" to generate heat to incubate the eggs.
Some species of snake are ovoviviparous and retain the eggs within their bodies until they are almost ready to hatch. Several species of snake, such as the boa constrictor and green anaconda, are fully viviparous, nourishing their young through a placenta as well as a yolk sac; this is highly unusual among reptiles, and normally found in requiem sharks or placental mammals. Retention of eggs and live birth are most often associated with colder environments.
Sexual selection in snakes is demonstrated by the 3,000 species that each use different tactics in acquiring mates. Ritual combat between males for the females they want to mate with includes topping, a behavior exhibited by most viperids in which one male will twist around the vertically elevated fore body of its opponent and force it downward. It is common for neck-biting to occur while the snakes are entwined.
Facultative parthenogenesis
Parthenogenesis is a natural form of reproduction in which growth and development of embryos occur without fertilization. Agkistrodon contortrix (copperhead) and Agkistrodon piscivorus (cottonmouth) can reproduce by facultative parthenogenesis, meaning that they are capable of switching from a sexual mode of reproduction to an asexual mode. The most likely type of parthenogenesis to occur is automixis with terminal fusion, a process in which two terminal products from the same meiosis fuse to form a diploid zygote. This process leads to genome-wide homozygosity, expression of deleterious recessive alleles, and often to developmental abnormalities. Both captive-born and wild-born copperheads and cottonmouths appear to be capable of this form of parthenogenesis.
Reproduction in squamate reptiles is almost exclusively sexual. Males ordinarily have a ZZ pair of sex-determining chromosomes, and females a ZW pair. However, the Colombian Rainbow boa (Epicrates maurus) can also reproduce by facultative parthenogenesis, resulting in production of WW female progeny. The WW females are likely produced by terminal automixis.
Embryonic Development
Snake embryonic development initially follows similar steps as any vertebrate embryo. The snake embryo begins as a zygote, undergoes rapid cell division, forms a germinal disc, also called a blastodisc, then undergoes gastrulation, neurulation, and organogenesis. Cell division and proliferation continues until an early snake embryo develops and the typical body shape of a snake can be observed. Multiple features differentiate the embryologic development of snakes from other vertebrates, two significant factors being the elongation of the body and the lack of limb development.
The elongation in snake body is accompanied by a significant increase in vertebra count (mice have 60 vertebrae, whereas snakes may have over 300). This increase in vertebrae is due to an increase in somites during embryogenesis, leading to an increased number of vertebrae which develop. Somites are formed at the presomitic mesoderm due to a set of oscillatory genes that direct the somitogenesis clock. The snake somitogenesis clock operates at a frequency 4 times that of a mouse (after correction for developmental time), creating more somites, and therefore creating more vertebrae. This difference in clock speed is believed to be caused by differences in Lunatic fringe gene expression, a gene involved in the somitogenesis clock.
There is ample literature focusing on the limb development/lack of development in snake embryos and the gene expression associated with the different stages. In basal snakes, such as the python, embryos in early development exhibit a hind limb bud that develops with some cartilage and a cartilaginous pelvic element, however this degenerates before hatching. This presence of vestigial development suggests that some snakes are still undergoing hind limb reduction before they are eliminated. There is no evidence in basal snakes of forelimb rudiments and no examples of snake forelimb bud initiation in embryo, so little is known regarding the loss of this trait. Recent studies suggests that hind limb reduction could be due to mutations in enhancers for the SSH gene, however other studies suggested that mutations within the Hox Genes or their enhancers could contribute to snake limblessness. Since multiple studies have found evidence suggesting different genes played a role in the loss of limbs in snakes, it is likely that multiple gene mutations had an additive effect leading to limb loss in snakes.
Behavior
Snake coiled on a stick in Oklahoma. It was brumating in a large pile of wood chips, found by this landscaper after he bulldozed the pile in late autumn 2018.
In regions where winters are too cold for snakes to tolerate while remaining active, local species will enter a period of brumation. Unlike hibernation, in which the dormant mammals are actually asleep, brumating reptiles are awake but inactive. Individual snakes may brumate in burrows, under rock piles, or inside fallen trees, or large numbers of snakes may clump together in hibernacula.
Feeding and diet
All snakes are strictly carnivorous, preying on small animals including lizards, frogs, other snakes, small mammals, birds, eggs, fish, snails, worms, and insects. Snakes cannot bite or tear their food to pieces so must swallow their prey whole. The eating habits of a snake are largely influenced by body size; smaller snakes eat smaller prey. Juvenile pythons might start out feeding on lizards or mice and graduate to small deer or antelope as an adult, for example.
The snake's jaw is a complex structure. Contrary to the popular belief that snakes can dislocate their jaws, they have an extremely flexible lower jaw, the two halves of which are not rigidly attached, and numerous other joints in the skull, which allow the snake to open its mouth wide enough to swallow prey whole, even if it is larger in diameter than the snake itself. For example, the African egg-eating snake has flexible jaws adapted for eating eggs much larger than the diameter of its head. This snake has no teeth, but does have bony protrusions on the inside edge of its spine, which it uses to break the shell when eating eggs.
The majority of snakes eat a variety of prey animals, but there is some specialization in certain species. King cobras and the Australian bandy-bandy consume other snakes. Species of the family Pareidae have more teeth on the right side of their mouths than on the left, as they mostly prey on snails and the shells usually spiral clockwise.
Some snakes have a venomous bite, which they use to kill their prey before eating it. Other snakes kill their prey by constriction, while some swallow their prey when it is still alive.
After eating, snakes become dormant to allow the process of digestion to take place; this is an intense activity, especially after consumption of large prey. In species that feed only sporadically, the entire intestine enters a reduced state between meals to conserve energy. The digestive system is then 'up-regulated' to full capacity within 48 hours of prey consumption. Being ectothermic ("cold-blooded"), the surrounding temperature plays an important role in the digestion process. The ideal temperature for snakes to digest food is 30 °C (86 °F). There is a huge amount of metabolic energy involved in a snake's digestion, for example the surface body temperature of the South American rattlesnake (Crotalus durissus) increases by as much as 1.2 °C (2.2 °F) during the digestive process. If a snake is disturbed after having eaten recently, it will often regurgitate its prey to be able to escape the perceived threat. When undisturbed, the digestive process is highly efficient; the snake's digestive enzymes dissolve and absorb everything but the prey's hair (or feathers) and claws, which are excreted along with waste.
Hooding and spitting
Hooding (expansion of the neck area) is a visual deterrent, mostly seen in cobras (elapids), and is primarily controlled by rib muscles.[98] Hooding can be accompanied by spitting venom towards the threatening object,[99] and producing a specialized sound; hissing. Studies on captive cobras showed that 13 to 22% of the body length is raised during hooding.
Locomotion
The lack of limbs does not impede the movement of snakes. They have developed several different modes of locomotion to deal with particular environments. Unlike the gaits of limbed animals, which form a continuum, each mode of snake locomotion is discrete and distinct from the others; transitions between modes are abrupt.
Lateral undulation
Lateral undulation is the sole mode of aquatic locomotion, and the most common mode of terrestrial locomotion In this mode, the body of the snake alternately flexes to the left and right, resulting in a series of rearward-moving "waves". While this movement appears rapid, snakes have rarely been documented moving faster than two body-lengths per second, often much less. This mode of movement has the same net cost of transport (calories burned per meter moved) as running in lizards of the same mass.
Terrestrial lateral undulation is the most common mode of terrestrial locomotion for most snake species. In this mode, the posteriorly moving waves push against contact points in the environment, such as rocks, twigs, irregularities in the soil, etc. Each of these environmental objects, in turn, generates a reaction force directed forward and towards the midline of the snake, resulting in forward thrust while the lateral components cancel out. The speed of this movement depends upon the density of push-points in the environment, with a medium density of about 8[clarification needed] along the snake's length being ideal. The wave speed is precisely the same as the snake speed, and as a result, every point on the snake's body follows the path of the point ahead of it, allowing snakes to move through very dense vegetation and small openings.
When swimming, the waves become larger as they move down the snake's body, and the wave travels backwards faster than the snake moves forwards. Thrust is generated by pushing their body against the water, resulting in the observed slip. In spite of overall similarities, studies show that the pattern of muscle activation is different in aquatic versus terrestrial lateral undulation, which justifies calling them separate modes. All snakes can laterally undulate forward (with backward-moving waves), but only sea snakes have been observed reversing the motion (moving backwards with forward-moving waves).
Sidewinding
Most often employed by colubroid snakes (colubrids, elapids, and vipers) when the snake must move in an environment that lacks irregularities to push against (rendering lateral undulation impossible), such as a slick mud flat, or a sand dune, sidewinding is a modified form of lateral undulation in which all of the body segments oriented in one direction remain in contact with the ground, while the other segments are lifted up, resulting in a peculiar "rolling" motion. This mode of locomotion overcomes the slippery nature of sand or mud by pushing off with only static portions on the body, thereby minimizing slipping. The static nature of the contact points can be shown from the tracks of a sidewinding snake, which show each belly scale imprint, without any smearing. This mode of locomotion has very low caloric cost, less than 1⁄3 of the cost for a lizard to move the same distance. Contrary to popular belief, there is no evidence that sidewinding is associated with the sand being hot.
Concertina
When push-points are absent, but there is not enough space to use sidewinding because of lateral constraints, such as in tunnels, snakes rely on concertina locomotion. In this mode, the snake braces the posterior portion of its body against the tunnel wall while the front of the snake extends and straightens. The front portion then flexes and forms an anchor point, and the posterior is straightened and pulled forwards. This mode of locomotion is slow and very demanding, up to seven times the cost of laterally undulating over the same distance. This high cost is due to the repeated stops and starts of portions of the body as well as the necessity of using active muscular effort to brace against the tunnel walls.
Arboreal
The movement of snakes in arboreal habitats has only recently been studied. While on tree branches, snakes use several modes of locomotion depending on species and bark texture. In general, snakes will use a modified form of concertina locomotion on smooth branches, but will laterally undulate if contact points are available. Snakes move faster on small branches and when contact points are present, in contrast to limbed animals, which do better on large branches with little 'clutter'.
Gliding snakes (Chrysopelea) of Southeast Asia launch themselves from branch tips, spreading their ribs and laterally undulating as they glide between trees. These snakes can perform a controlled glide for hundreds of feet depending upon launch altitude and can even turn in midair.
Rectilinear
The slowest mode of snake locomotion is rectilinear locomotion, which is also the only one where the snake does not need to bend its body laterally, though it may do so when turning. In this mode, the belly scales are lifted and pulled forward before being placed down and the body pulled over them. Waves of movement and stasis pass posteriorly, resulting in a series of ripples in the skin. The ribs of the snake do not move in this mode of locomotion and this method is most often used by large pythons, boas, and vipers when stalking prey across open ground as the snake's movements are subtle and harder to detect by their prey in this manner.
Interactions with humans
Snakes do not ordinarily prey on humans. Unless startled or injured, most snakes prefer to avoid contact and will not attack humans. With the exception of large constrictors, nonvenomous snakes are not a threat to humans. The bite of a nonvenomous snake is usually harmless; their teeth are not adapted for tearing or inflicting a deep puncture wound, but rather grabbing and holding. Although the possibility of infection and tissue damage is present in the bite of a nonvenomous snake, venomous snakes present far greater hazard to humans. The World Health Organization (WHO) lists snakebite under the "other neglected conditions" category.
Documented deaths resulting from snake bites are uncommon. Nonfatal bites from venomous snakes may result in the need for amputation of a limb or part thereof. Of the roughly 725 species of venomous snakes worldwide, only 250 are able to kill a human with one bite. Australia averages only one fatal snake bite per year. In India, 250,000 snakebites are recorded in a single year, with as many as 50,000 recorded initial deaths. The WHO estimates that on the order of 100,000 people die each year as a result of snake bites, and around three times as many amputations and other permanent disabilities are caused by snakebites annually.
The treatment for a snakebite is as variable as the bite itself. The most common and effective method is through antivenom (or antivenin), a serum made from the venom of the snake. Some antivenom is species-specific (monovalent) while some is made for use with multiple species in mind (polyvalent). In the United States for example, all species of venomous snakes are pit vipers, with the exception of the coral snake. To produce antivenom, a mixture of the venoms of the different species of rattlesnakes, copperheads, and cottonmouths is injected into the body of a horse in ever-increasing dosages until the horse is immunized. Blood is then extracted from the immunized horse. The serum is separated and further purified and freeze-dried. It is reconstituted with sterile water and becomes antivenom. For this reason, people who are allergic to horses are more likely to have an allergic reaction to antivenom. Antivenom for the more dangerous species (such as mambas, taipans, and cobras) is made in a similar manner in South Africa, Australia , and India, although these antivenoms are species-specific.
Snake charmers
In some parts of the world, especially in India, snake charming is a roadside show performed by a charmer. In such a show, the snake charmer carries a basket containing a snake that he seemingly charms by playing tunes with his flutelike musical instrument, to which the snake responds. The snake is in fact responding to the movement of the flute, not the sound it makes, as snakes lack external ears (though they do have internal ears).
The Wildlife Protection Act of 1972 in India technically prohibits snake charming on the grounds of reducing animal cruelty. Other types of snake charmers use a snake and mongoose show, where the two animals have a mock fight; however, this is not very common, as the animals may be seriously injured or killed. Snake charming as a profession is dying out in India because of competition from modern forms of entertainment and environment laws proscribing the practice. Many Indians have never seen snake charming and it is becoming a folktale of the past.
Trapping
The Irulas tribe of Andhra Pradesh and Tamil Nadu in India have been hunter-gatherers in the hot, dry plains forests, and have practiced the art of snake catching for generations. They have a vast knowledge of snakes in the field. They generally catch the snakes with the help of a simple stick. Earlier, the Irulas caught thousands of snakes for the snake-skin industry. After the complete ban of the snake-skin industry in India and protection of all snakes under the Indian Wildlife (Protection) Act 1972, they formed the Irula Snake Catcher's Cooperative and switched to catching snakes for removal of venom, releasing them in the wild after four extractions. The venom so collected is used for producing life-saving antivenom, biomedical research and for other medicinal products. The Irulas are also known to eat some of the snakes they catch and are very useful in rat extermination in the villages.
Despite the existence of snake charmers, there have also been professional snake catchers or wranglers. Modern-day snake trapping involves a herpetologist using a long stick with a V-shaped end. Some television show hosts, like Bill Haast, Austin Stevens, Steve Irwin, and Jeff Corwin, prefer to catch them using bare hands.
Consumption
Although snakes are not commonly thought of as food, their consumption is acceptable in some cultures and may even be considered a delicacy. Snake soup is popular in Cantonese cuisine, consumed by locals in the autumn to warm their bodies. Western cultures document the consumption of snakes only under extreme circumstances of hunger, with the exception of cooked rattlesnake meat, which is commonly consumed in Texas and parts of the Midwestern United States.
In Asian countries such as China, Taiwan, Thailand, Indonesia, Vietnam, and Cambodia, drinking the blood of a snake—particularly the cobra—is believed to increase sexual virility. When possible, the blood is drained while the cobra is still alive, and it is usually mixed with some form of liquor to improve the taste.
The use of snakes in alcohol is accepted in some Asian countries. In such cases, one or more snakes are left to steep in a jar or container of liquor, as this is claimed to make the liquor stronger (as well as more expensive). One example of this is the Habu snake, which is sometimes placed in the Okinawan liqueur Habushu (ハブ酒), also known as "Habu Sake".
Snake wine (蛇酒) is an alcoholic beverage produced by infusing whole snakes in rice wine or grain alcohol. First recorded as being consumed in China during the Western Zhou dynasty, this drink is considered an important curative and is believed to reinvigorate a person according to traditional Chinese medicine
Pets
In the Western world, some snakes are kept as pets, especially docile species such as the ball python and corn snake. To meet the demand, a captive breeding industry has developed. Snakes bred in captivity are considered preferable to specimens caught in the wild and tend to make better pets. Compared with more traditional types of companion animal, snakes can be very low-maintenance pets; they require minimal space, as most common species do not exceed 5 feet (1.5 m) in length, and can be fed relatively infrequently—usually once every five to 14 days. Certain snakes have a lifespan of more than 40 years if given proper care.
Symbolism
In ancient Mesopotamia, Nirah, the messenger god of Ištaran, was represented as a serpent on kudurrus, or boundary stones. Representations of two intertwined serpents are common in Sumerian art and Neo-Sumerian artwork and still appear sporadically on cylinder seals and amulets until as late as the thirteenth century BC. The horned viper (Cerastes cerastes) appears in Kassite and Neo-Assyrian kudurrus and is invoked in Assyrian texts as a magical protective entity. A dragon-like creature with horns, the body and neck of a snake, the forelegs of a lion, and the hind-legs of a bird appears in Mesopotamian art from the Akkadian Period until the Hellenistic Period (323 BC–31 BC). This creature, known in Akkadian as the mušḫuššu, meaning "furious serpent", was used as a symbol for particular deities and also as a general protective emblem. It seems to have originally been the attendant of the Underworld god Ninazu, but later became the attendant to the Hurrian storm-god Tishpak, as well as, later, Ninazu's son Ningishzida, the Babylonian national god Marduk, the scribal god Nabu, and the Assyrian national god Ashur.
In Egyptian history, the snake occupies a primary role with the Nile cobra adorning the crown of the pharaoh in ancient times. It was worshipped as one of the gods and was also used for sinister purposes: murder of an adversary and ritual suicide (Cleopatra). The ouroboros was a well-known ancient Egyptian symbol of a serpent swallowing its own tail. The precursor to the ouroboros was the "Many-Faced", a serpent with five heads, who, according to the Amduat, the oldest surviving Book of the Afterlife, was said to coil around the corpse of the sun god Ra protectively. The earliest surviving depiction of a "true" ouroboros comes from the gilded shrines in the tomb of Tutankhamun. In the early centuries AD, the ouroboros was adopted as a symbol by Gnostic Christians and chapter 136 of the Pistis Sophia, an early Gnostic text, describes "a great dragon whose tail is in its mouth". In medieval alchemy, the ouroboros became a typical western dragon with wings, legs, and a tail.
In the Bible, King Nahash of Ammon, whose name means "Snake", is depicted very negatively, as a particularly cruel and despicable enemy of the ancient Hebrews.
The ancient Greeks used the Gorgoneion, a depiction of a hideous face with serpents for hair, as an apotropaic symbol to ward off evil. In a Greek myth described by Pseudo-Apollodorus in his Bibliotheca, Medusa was a Gorgon with serpents for hair whose gaze turned all those who looked at her to stone and was slain by the hero Perseus. In the Roman poet Ovid's Metamorphoses, Medusa is said to have once been a beautiful priestess of Athena, whom Athena turned into a serpent-haired monster after she was raped by the god Poseidon in Athena's temple. In another myth referenced by the Boeotian poet Hesiod and described in detail by Pseudo-Apollodorus, the hero Heracles is said to have slain the Lernaean Hydra, a multiple-headed serpent which dwelt in the swamps of Lerna.
The legendary account of the foundation of Thebes mentioned a monster snake guarding the spring from which the new settlement was to draw its water. In fighting and killing the snake, the companions of the founder Cadmus all perished – leading to the term "Cadmean victory" (i.e. a victory involving one's own ruin).
Three medical symbols involving snakes that are still used today are Bowl of Hygieia, symbolizing pharmacy, and the Caduceus and Rod of Asclepius, which are symbols denoting medicine in general.
One of the etymologies proposed for the common female first name Linda is that it might derive from Old German Lindi or Linda, meaning a serpent.
India is often called the land of snakes and is steeped in tradition regarding snakes. Snakes are worshipped as gods even today with many women pouring milk on snake pits (despite snakes' aversion for milk). The cobra is seen on the neck of Shiva and Vishnu is depicted often as sleeping on a seven-headed snake or within the coils of a serpent. There are also several temples in India solely for cobras sometimes called Nagraj (King of Snakes) and it is believed that snakes are symbols of fertility. There is a Hindu festival called Nag Panchami each year on which day snakes are venerated and prayed to. See also Nāga.
In India there is another mythology about snakes. Commonly known in Hindi as "Ichchhadhari" snakes. Such snakes can take the form of any living creature, but prefer human form. These mythical snakes possess a valuable gem called "Mani", which is more brilliant than diamond. There are many stories in India about greedy people trying to possess this gem and ending up getting killed.
The snake is one of the 12 celestial animals of Chinese zodiac, in the Chinese calendar.
Many ancient Peruvian cultures worshipped nature. They emphasized animals and often depicted snakes in their art.
Religion
Snakes are used in Hinduism as a part of ritual worship. In the annual Nag Panchami festival, participants worship either live cobras or images of Nāgas. Lord Shiva is depicted in most images with a snake coiled around his neck. Puranic literature includes various stories associated with snakes, for example Shesha is said to hold all the planets of the Universe on his hoods and to constantly sing the glories of Vishnu from all his mouths. Other notable snakes in Hinduism are Vasuki, Takshaka, Karkotaka, and Pingala. The term Nāga is used to refer to entities that take the form of large snakes in Hinduism and Buddhism.
Snakes have been widely revered in many cultures, such as in ancient Greece where the serpent was seen as a healer.[148] Asclepius carried a serpent wound around his wand, a symbol seen today on many ambulances. In Judaism, the snake of brass is also a symbol of healing, of one's life being saved from imminent death.
In religious terms, the snake and jaguar were arguably the most important animals in ancient Mesoamerica. "In states of ecstasy, lords dance a serpent dance; great descending snakes adorn and support buildings from Chichen Itza to Tenochtitlan, and the Nahuatl word coatl meaning serpent or twin, forms part of primary deities such as Mixcoatl, Quetzalcoatl, and Coatlicue." In the Maya and Aztec calendars, the fifth day of the week was known as Snake Day.
In some parts of Christianity, the redemptive work of Jesus Christ is compared to saving one's life through beholding the Nehushtan (serpent of brass). Snake handlers use snakes as an integral part of church worship, to demonstrate their faith in divine protection. However, more commonly in Christianity, the serpent has been depicted as a representative of evil and sly plotting, as seen in the description in Genesis of a snake tempting Eve in the Garden of Eden. Saint Patrick is purported to have expelled all snakes from Ireland while converting the country to Christianity in the 5th century, thus explaining the absence of snakes there.
In Christianity and Judaism, the snake makes its infamous appearance in the first book of the Bible when a serpent appears before Adam and Eve and tempts them with the forbidden fruit from the Tree of Knowledge. The snake returns in the Book of Exodus when Moses turns his staff into a snake as a sign of God's power, and later when he makes the Nehushtan, a bronze snake on a pole that when looked at cured the people of bites from the snakes that plagued them in the desert. The serpent makes its final appearance symbolizing Satan in the Book of Revelation: "And he laid hold on the dragon the old serpent, which is the devil and Satan, and bound him for a thousand years."
In Neo-Paganism and Wicca, the snake is seen as a symbol of wisdom and knowledge. Additionally, snakes are sometimes associated with Hecate, the Greek goddess of witchcraft.
Medicine
Several compounds from snake venoms are being researched as potential treatments or preventatives for pain, cancers, arthritis, stroke, heart disease, hemophilia, and hypertension, and to control bleeding (e.g. during surgery).
Sidney Woodruff, graduate student, get a photo of Raaghav Sexena, animal biology major, with the Western Pond Turtle in the Arboretum on June 8, 2022.
The project involves assisting Dr. Brian Todd and Ph.D. Student Sidney Woodruff in a research study evaluating how native species respond to the removal of non-native species and waterway restoration. The research objectives are to investigate the abundance and population demography of the native Western pond turtle (Actineymys marmorata) and population response in growth and demography from the removal of non-native red-eared sliders. Natural populations of the Western pond turtle are found in the UC Davis Arboretum where red-eared sliders occupy the same ecological niche in high densities. Natural populations of Western pond turtles are found in the nearby South Fork of Putah Creek where the presence of non-native turtles is extremely low or nonexistent. This work can highlight the importance of waterway restoration in building a more resilient ecosystem while supporting the recovery and conservation of native species.
Providing this opportunity will allow undergraduate students to be involved in wildlife conservation research under the supervision of a graduate student mentor and PI while also supporting the objectives of this study and the restoration of the UC Davis Arboretum.
One of my final shots; the air had gone from totally calm to a light breeze, and big rain drops were starting to splatter down. As if they knew what was coming - and in a way, they must have - the insects in my alfalfa patch just wanted to hunker down and wait out the storm. I know that it is fanciful to refer to an insect "wanting" anything... but who can resist anthropomorphizing when confronted by a face like this?
Tech info: I prefer natural light to flash when shooting insects, but that sometimes entails the use of slow shutter speeds. In this case, with the macro focused as close as it would go, ISO set at 400 to keep the digital noise low, I had to stop down the aperture because of the very shallow depth of field. This was only possible because my subject was less active than some of the other critters I photographed that morning. It hid behind an alfalfa stem and watched me. With an aperture of f/25 and shutter speed at 1/5 second, even in relative stillness many shots are going to be unsharp. Therefore I fired a long burst on "continuous" (formerly called motor drive), and out of a dozen frames I managed one or two where my subject was still and the slight tremble from the wind nonexistent.
Don't use this image on websites, blogs or other media without explicit permission.
© James R. Page - all rights reserved.
This is the second time we've stayed at this campsite and it's always a very tight fit. No part of it could be considered beach, or even level. But it makes for a nice enough stop with good access to slow water. We did some paddleboarding, but the fishing was nonexistent the last time we were here.
A quiet path
Our tread seems muffled
Walking on the weathered boards
We expect to creak
Noise of the city nonexistent
Holding hands we walk
Soaking in the silence
Enjoying the company...
A quiet path
Our tread seems muffled
Walking on the weathered boards
We expect to creak
Noise of the city nonexistent
Holding hands we walk
Soaking in the silence
Enjoying the company...
Mendon Ponds Park is owned and very poorly maintained by the County of Monroe, NY.
Unfortunately, this extraordinary property is rapidly deteriorating due to an egregious lack of care. Trails are not cleared of debris... signs are useless. Park maintenance is essentially nonexistent. They do have a marketing department. Seriously, the taxpayers are paying the salaries of a county parks marketing department.
Email Mendon Ponds Park complaints to: countyexecutive@monroecounty.gov
Mendon Ponds Park - Brook Video
November 29, 2010 / Temp: 49° F
Camera: Flip Ultra HD U2120
Mendon Ponds Park is owned and very poorly maintained by the County of Monroe, NY.
Unfortunately, this extraordinary property is rapidly deteriorating due to an egregious lack of care. Trails are not cleared of debris... signs are useless. Park maintenance is essentially nonexistent. They do have a marketing department. Seriously, the taxpayers are paying the salaries of a county parks marketing department.
Email Mendon Ponds Park complaints to: countyexecutive@monroecounty.gov
Ok so if we've been connected for a while then you'll know what I mean when I say I'm on the "Ways Of The Zhong" again .. So I started last Thursday I think .. I haven't stepped on the scale to know how much I've dropped so far with the detox but it has definitely been working .. Dr. Zhong is so strict that you aren't even supposed to chew gum while doing this .. So of course this means that the food pics will be nonexistent for quite a while lol ..
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
Ready Or Not, Jesus Is Coming
Signage 12th Street and Airport Blvd. Austin Tx
The church is no longer there.
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
Atlanta Braves baseball from 20 September 2019 (the night they clinched the division crown). The new park (opened in 2018) gets panned a little because it's usually pretty hot in Georgia and a heck of a lot of seats are in direct sun.
It's a relatively generic stadium (in the new mold of generic stadiums), but it's nice. The area outside the stadium (bars/restaurants) is actually a bit more interesting/unique than the stadium itself.
The biggest drawback is that the Atlanta Braves no longer play in Atlanta. (That and parking is almost nonexistent up there in Marietta near the stadium. We were scratching our heads looking for the actual parking lots.)
As for the game...it was a great game. First time in my life I actually got to see a division-clinching game. (They'd clinched a playoff spot a few days before.)
Thanks to the surprise snow storm, traffic was virtually nonexistent, and I was able to stop momentarily in the middle of Sentinel Bridge long enough to capture this vista looking west along the Merced River. It was my first time camping in Yosemite Valley and I woke up to several inches of fresh snow on the ground. Beautiful!
Please view on black using the magnifying glass above the image. Unless otherwise noted, this image was shot with a Panasonic Lumix. All of my photos, videos and text are copyright Kahlee Brighton, all rights reserved. This material is not in the public domain. It may not be copied, printed or otherwise reproduced in any manner or form, whether in whole or in part, used on websites, blogs, or in any other media without my express written permission in advance. If you'd like to purchase, license or in any way use my work, please contact me directly. Thank you.
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
Every history blog alludes to Gatsby when mentioning Corona or Flushing- here’s the much discussed couplet:
from F. Scott Fitzgerald’s “Great Gatsby“
About half way between West Egg and New York the motor road hastily joins the railroad and runs beside it for a quarter of a mile, so as to shrink away from a certain desolate area of land. This is a valley of ashes—a fantastic farm where ashes grow like wheat into ridges and hills and grotesque gardens; where ashes take the forms of houses and chimneys and rising smoke and, finally, with a transcendent effort, of men who move dimly and already crumbling through the powdery air. Occasionally a line of gray cars crawls along an invisible track, gives out a ghastly creak, and comes to rest, and immediately the ash-gray men swarm up with leaden spades and stir up an impenetrable cloud, which screens their obscure operations from your sight. But above the gray land and the spasms of bleak dust which drift endlessly over it, you perceive, after a moment, the eyes of Doctor T. J. Eckleburg. The eyes of Doctor T. J. Eckleburg are blue and gigantic—their irises are one yard high. They look out of no face, but, instead, from a pair of enormous yellow spectacles which pass over a nonexistent nose. Evidently some wild wag of an oculist set them there to fatten his practice in the borough of Queens, and then sank down himself into eternal blindness, or forgot them and moved away. But his eyes, dimmed a little by many paintless days, under sun and rain, brood on over the solemn dumping ground.
The valley of ashes is bounded on one side by a small foul river, and, when the drawbridge is up to let barges through, the passengers on waiting trains can stare at the dismal scene for as long as half an hour. There is always a halt there of at least a minute, and it was because of this that I first met Tom Buchanan’s mistress.
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
apparently there are a lot of people who have never seen a 2 dollar bill before. Some european tourist off loaded about 30 of them on me, and I have had a hard time spending them without getting weird looks. Like I am a crazy counterfeiter who printed up a nonexistent denomination for shits and giggles or something.
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
1993 Suède Sweden Svezia
Escapade en train à Blåhammaren, dans le nord de la Suède, près de la frontier norvégienne.
Il est conseillé de savoir lire une carte et utiliser la boussole, car les sentiers ne sont pas bien marqués et on ne rencontre quasi personne ... le temps peut aussi changer brusquement : en qq minutes on passé de l'été à l'hiver avec de la neige (meme en plein mois de juillet).
Week-end close to the Norwegian border, in the north of Sweden, at Blåhammaren.
It is recommended to be able to read a map and use a compass because the paths are almost nonexistent ... the weather can also change within minutes going from Summer into Winter (with snow mid of July).
Camminata vicina al confine con la Norvegia, a Blåhammaren (2 giorni).
Saper leggere una mappa e utilizzare una bussola è d'obbligo perché i sentieri non si vedono bene. E non c'è molta gente da incontrare ! Subito il meteo può anche cambiare da estate a inverno con neve a metà luglio !
My wishlist....
Souldoll Vito Lester : Varg!! This is already decided. After months of thinking He is the perfect tall and manly doll in MSD friendly size i Have found. He is 52cm of pure sexyness asdas
2. PA225922
Minifée Miyu:Adult Merle!! I finally decided in a miyu for Being Mere in adult form. She is not alike to Minoruworld leila, but I think she suits the character very well * w *
Minifé Shushu moddified: Nienna! yep, but in a lot more time xD lalala i'll have to find the courage to make a lip modd...
4. Jason
Lati Blue Rucas: He was the Former varg, since he was the taller MSD and the most mature off all them. He's still on wishlist since is quite Good to make my Character Zwei = w =
A daring Florida couple quit their jobs and sold all their worldly goods then moved into a 12'X14' hut (no electricity or plumbing) on a 3-acre island in the Gulf of Mexico to fulfill a dream: exploring The Ten Thousand Islands and Everglades by canoe -- covering 3,500 miles -- during their 30-month sojourn there, 1957-1960.
University of Florida, Class of 1952: Barbara Home Stewart (BA, Psychology) is featured with her husband Orin Good Fogle in the video Everglades Odyssey, which portrays the couple exploring the Everglades when development of that area was almost nonexistent.
024
Fortune Global Forum 2018
October 16th, 2018
Toronto, Canada
3:30 PM
THE NEW GLOBAL CONSUMER: DOING BUSINESS IN A DIGITAL ECONOMY
The digital economy is no longer part of the economy. It is the economy. How can traditional brick-and-mortar firms reinvent themselves, their supply chains, and their marketplaces to avoid the fate of brands once thought of as everlasting but which are now nonexistent? And how are new platforms – from e-commerce to shared services – rewriting the rules of the game? A conversation on how businesses can manage expectations for digitally empowered customers, and how technology is being used to enhance the customer experience.
Alain Bejjani, Chief Executive Officer, Majid al Futtaim
Andrea Stairs, General Manager, Canada and Latin America, eBay
Ning Tang, Founder and CEO, CreditEase
Moderator: Phil Wahba, Senior Writer, Fortune
Photograph by Stuart Isett/Fortune
Plaisance
Leeville, Louisiana
on Bayou LaFourche
LaFourche Parish
Some of the greatest fishing is right here.
Leeville was settled by flood victims. On October 1, 1893, a hurricane wiped out the area's main settlement, Caminadaville, which sat on a spit of land bordered on three sides by the Gulf and on the fourth by swamp. Nearly half of Caminadaville's inhabitants perished in the storm, most by drowning, some when the buildings they had taken refuge in collapsed.
Survivors sailed up the bayou in their damaged canots and began buying land from an orange-grower named Peter Lee, who was selling plots for $12.50 each. For sixteen years, they fished, planted rice, and held fais do-do dancing parties in homes with covered verandas.
Then, in 1909, the Leeville Hurricane struck. (A contemporary newspaper account described survivors of that storm subsisting on drowned rabbit.) Six years later, a third hurricane forced residents to flee north once more. According to local legend, the storm surge carried one house from Leeville nine miles inland. The owner simply bought the plot underneath it and moved back in.
In the nineteen-thirties, Leeville rebounded briefly. Oil was discovered in the area, and by the end of the decade there were ninety-eight producing wells in town. The pay was good and regulation nonexistent. Blowouts routinely rained sulfur and brine onto the houses, into the cisterns, over the trees. Tin roofs corroded and vegetable gardens shrivelled up. When the wells ran dry, oil production moved offshore and Leeville was again deserted.
There were no more jobs, and the town itself had begun to wash away. Where once men in straw hats picked oranges and harvested rice, today there is mostly open water.
from: www.accessmylibrary.com/coms2/summary_0286-15339115_ITM
This Stromberg WA3-219 ("Mode
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling an
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling and production of such a low-volume carburetor. Was there a strike at Holley or Carter that reduced the supply of 1920s and BBSs...? One interesting tidbit: The WA3 has the largest venturi of any 1bbl used from the factory on a slant-6 engine.
I've tried a few of these over the years. Haven't made one run quite right. Kits and parts are almost nonexistent. But the casting and build qu
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling and production of such a low-volume carburetor. Was there a strike at Holley or Carter that reduced the supply of 1920s and BBSs...? One interesting tidbit: The WA3 has the largest venturi of any 1bbl used from the factory on a slant-6 engine.
I've tried a few of these over the years. Haven't made one run quite right. Kits and parts are almost nonexistent. But the casting and build quality are quite excellent, typical of Stromberg carburetors of the era.
This is my first attempt at HDR.
It was a sunny day so I decided to visit The British Museum. Unfortunately by the time I got there, it became cloudy and the dramatic deep blue sky I had hoped to capture with sun light streaming through the curved glass roof and casting shadows were nonexistent. :-( Instead the sky turned a whitish grey and inside the museum everything looked dull and colourless. So HDR to the rescue!
All the shots were taken handheld (who says you need a tripod) 3 bracketed exposures set at continuous firing.
After a few hours at the museum as the weather was poor I decided to visit Westminster Cathedral. I had to struggle to get there and find parking. Once inside I found out that photography wasn’t allowed during a service so I had to wait around an hour until it finished. I think I captured some good shots for HDR but unbelievably, when I got back home and started to download the photos, half way through the download the memory card got somehow got jammed and I couldn’t download the photos from the church. What a nightmare! A wasted afternoon:-( By the way, this was a new 32GB Kingston elite pro card. The shop recommended it to me as they didn’t have the Lexar in stock that I wanted. So I won’t be buyer Kingston cards again.
Anyway, I hope you enjoy the photos.
As it’s my first attempt at HDR I would be grateful for your comments, criticisms etc.
Leeville, Louisiana
on Bayou LaFourche
LaFourche Parish
Leeville was settled by flood victims. On October 1, 1893, a hurricane wiped out the area's main settlement, Caminadaville, which sat on a spit of land bordered on three sides by the Gulf and on the fourth by swamp. Nearly half of Caminadaville's inhabitants perished in the storm, most by drowning, some when the buildings they had taken refuge in collapsed.
Survivors sailed up the bayou in their damaged canots and began buying land from an orange-grower named Peter Lee, who was selling plots for $12.50 each. For sixteen years, they fished, planted rice, and held fais do-do dancing parties in homes with covered verandas.
Then, in 1909, the Leeville Hurricane struck. (A contemporary newspaper account described survivors of that storm subsisting on drowned rabbit.) Six years later, a third hurricane forced residents to flee north once more. According to local legend, the storm surge carried one house from Leeville nine miles inland. The owner simply bought the plot underneath it and moved back in.
In the nineteen-thirties, Leeville rebounded briefly. Oil was discovered in the area, and by the end of the decade there were ninety-eight producing wells in town. The pay was good and regulation nonexistent. Blowouts routinely rained sulfur and brine onto the houses, into the cisterns, over the trees. Tin roofs corroded and vegetable gardens shrivelled up. When the wells ran dry, oil production moved offshore and Leeville was again deserted.
There were no more jobs, and the town itself had begun to wash away. Where once men in straw hats picked oranges and harvested rice, today there is mostly open water.
from: www.accessmylibrary.com/coms2/summary_0286-15339115_ITM
The Hathaway Garage once had windows, now it has paintings of fake storefronts and a sign for a fake museum
This Stromberg WA3-219 ("Mode
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling an
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling and production of such a low-volume carburetor. Was there a strike at Holley or Carter that reduced the supply of 1920s and BBSs...? One interesting tidbit: The WA3 has the largest venturi of any 1bbl used from the factory on a slant-6 engine.
I've tried a few of these over the years. Haven't made one run quite right. Kits and parts are almost nonexistent. But the casting and build qu
This Stromberg WA3-219 (Model W) carburetor was original equipment, as a production option to the Carter BBS and Holley 1920, on 1963 (only) Dodge and Plymouth B- and C-body cars (only) with 225 engine and automatic transmission (only). No variant of this carb was used on any other model or year. I have no idea why Chrysler would've spent what had to be a real whackload of money for tooling and production of such a low-volume carburetor. Was there a strike at Holley or Carter that reduced the supply of 1920s and BBSs...? One interesting tidbit: The WA3 has the largest venturi of any 1bbl used from the factory on a slant-6 engine.
I've tried a few of these over the years. Haven't made one run quite right. Kits and parts are almost nonexistent. But the casting and build quality are quite excellent, typical of Stromberg carburetors of the era.
+++ DISCLAIMER +++
Nothing you see here is real, even though the conversion or the presented background story might be based on historical facts. BEWARE!
Some background:
The North American Aviation P-51 Mustang was an American long-range, single-seat fighter and fighter-bomber used during World War II and the Korean War, among other conflicts. The Mustang was designed in 1940 by North American Aviation (NAA) in response to a requirement of the British Purchasing Commission. The Purchasing Commission approached North American Aviation to build Curtiss P-40 fighters under license for the Royal Air Force (RAF). Rather than build an old design from another company, North American Aviation proposed the design and production of a more modern fighter. The prototype NA-73X airframe was rolled out on 9 September 1940, 102 days after the contract was signed, and first flew on 26 October.
The Mustang was originally designed to use the Allison V-1710 engine, which, in its earlier variants, had limited high-altitude performance. It was first flown operationally by the RAF as a tactical-reconnaissance aircraft and fighter-bomber (Mustang Mk I). Production of the P-51B/C began at North American's Inglewood California plant in June 1943 and P-51s started to become available to the 8th and 9th Air Forces in the winter of 1943–1944. The addition of the Rolls-Royce Merlin to the P-51B/C model transformed the Mustang's performance at altitudes above 15,000 ft, allowing the aircraft to compete with the Luftwaffe's fighters. Among the almost 4.000 Mustangs of this variant built a quarter was supplied under Lend-Lease to the RAF as the Mustang Mk III. The definitive version, the P-51D, was powered by the Packard V-1650-7, a license-built version of the two-speed, two-stage-supercharged Merlin 66, and was armed with six .50 caliber (12.7 mm) AN/M2 Browning machine guns.
The P-51 offered an excellent performance, but North American kept trying to improve, and developed a number of lightweight versions. The lightweight Mustangs had a new wing design and airfoils designed to give less drag than the previous NAA/NACA 45-100. In addition, the planform was a simple trapezoid, with no leading-edge extension at the root.
In 1943, North American submitted a proposal to redesign the P-51D as model NA-104, from an enquiry by the USAAF as to why British aircraft were lighter than American ones. NAA engineers had examined the various components and equipment fitted to Spitfires, and through thorough inspection of airframes and construction plans NAA found that British load factors were less than American ones, and working to the lower load factors helped the design team reduce structural weight wherever possible. Exploiting the structural potential and lightening or reducing other equipment, the NA-104’s revised design was in total some 1,600 lb (730 kg) lighter than the P-51D. Modifications to save weight and improve performance included a thinner laminar flow wing, streamlining changes to the cowling, a simplified undercarriage with smaller wheels and disc brakes (necessitated by the thinner wings), a different canopy, and an armament of only four 0.5” Brownings, even though the ammunition supply was changed to 400 rounds per gun.
The lightweight NA-104 was powered by the new V-1650-9 engine, a redesigned "slimline" version of the Merlin 100-series. The engine’s design was modified to decrease frontal area to a minimum and was the first Merlin series to use down-draught induction systems. The coolant pump was moved from the bottom of the engine to the starboard side, and the engine featured a two-speed, two-stage supercharger and an S.U. injection carburetor. The V-1650-9 not only delivered an increased constant output of 1,380 hp (1,030 kW), it also featured a water-methanol injection that could temporarily boost the engine’s emergency power to 2,218 hp (1.655 kW). The exhaust arrangement was revised, too, exploiting the engine’s residual thrust to gain even more speed. An “uncuffed” three-blade Aeroproducts propeller unit with deeper blades was fitted, to better cope with the higher power output and the higher blade speeds
.
Unlike later lightweight Mustang versions/prototypes the NA-104‘s ventral radiator fairing remained the same shape and size, just as the main landing gear and its covers, both were, despite improved designs on the prototyoe workbench, retained to promote a quick production introduction. The former V-1650-7’s carburetor chin intake was relocated into the right wing’s root, and the cowling was modified and streamlined. The modified nose section was slightly longer than on previous Mustang versions, and to compensate for a resulting slight center of gravity shift forward the rear fuselage was slightly extended with a plug in the rear fuselage, just front of the tail surfaces, what increased the NA-104’s overall length by ~10 inch. As a side effect the longitudinal stability improved, so that the NA-104 did not require the stabilizing fin fillet that had been introduced on the P-51D and some late production P-51B/Cs, too.
In test flights, the NA-104, with optimized fuel load and a highly polished finish, achieved 491 mph (790 km/h) at 21,000 ft (6,400 m). In September 1944 the NA-104 was accepted by the USAAF as a high-performance interceptor under the designation P-51E. 500 aircraft were ordered, primarily for operations in Europe, specifically for the 8th and 9th Air Force, to protect the Allied airfields in Great Britain and as long-range escort fighters for Allied bomber raids against Germany. An option for 1.000 more was signed, too, to be delivered from August 1945.
The first P-51Es arrived in Great Britain in January 1945. However, large-scale combat between 8th Fighter Command and the Luftwaffe interceptor force had become virtually nonexistent after 28 May 1944 but, in August, contact had been made for the first time with both rocket-propelled and jet-propelled interceptors. While themselves a harbinger of a tactical change by the Luftwaffe, the contacts also indicated that the Germans were husbanding their fighter aircraft for sporadic reaction against Allied bomber attacks.
Operational tasks for the USAAFs P-51Es included the support of bomber attacks against German ground transportation during the Allied counter-offensive in the Ardennes in early 1945, strafing ground targets daily. However, on 14 January, strategic bombing resumed with attacks on oil installations near Berlin, and Mustangs were frequently tasked with protecting B-17s, employing a variation of the escort tactic called the "Zemke Fan", designed to lure in interceptors.
The Luftwaffe’s Jagdverbände, severely depleted, turned to jet interceptions beginning 9 February 1945 in an attempt to stop the onslaught of Allied heavy bombers. The Allies countered by flying combat air patrol missions over German airfields, intercepting Me 262s and Ar 234s as they took off and landed, the moment when these fast aircraft were most vulnerable. The tactic resulted in increasing numbers of jets shot down and controlled the dangerous situation, particularly as the amount of German-controlled territory shrank daily.
Another threat was the V-1 flying bomb attacks that had begun in mid-June 1944. The only aircraft with the low-altitude speed to be effective against it was the Hawker Tempest, but by that time fewer than 30 Tempests were available, assigned to No. 150 Wing RAF. Early attempts to intercept and destroy V-1s often failed, but improved techniques soon emerged. These included using the airflow over an interceptor's wing to raise one wing of the V-1, by sliding the wingtip to within 6 in (15 cm) of the lower surface of the V-1's wing. If properly executed, this maneuver would tip the V-1's wing up, over-riding the gyro and sending the V-1 into an out-of-control dive. At least sixteen V-1s were destroyed this way, the first by a P-51 piloted by Major R. E. Turner of 356th Fighter Squadron on 18 June 1944. Once available, the USAAF’s P-51Es were frequently assigned to V-1 interception duties over the Channel and the southern coast of England, alleviating RAF units.
However, with the end of hostilities in Europe in May 1945 the P-51E contract was cancelled, as well as the option for more aircraft. Altogether only 363 lightweight P-51Es were completed and reached frontline units, exclusively operating with the 8th and 9th Fighter Command.
General characteristics:
Crew: 1
Length: 33 ft 3 in (10,15 m)
Wingspan: 37 ft 0 in (11,28 m)
Height: 13 ft 4½ in (4,08 m)
Wing area: 234 sq ft (21,81 m²)
Airfoil: NACA 66(2)-215
Empty weight: 5,792 lb (2.630 kg)
Loaded weight: 7,268 lb (3.300 kg)
Max. take-off weight: 9,559 lb (4.340 kg)
Maximum fuel capacity: 419 US gal (349 imp gal; 1,590 l)
Powerplant:
1× Packard V-1650-9 liquid-cooled V-12 with 2-stage intercooled supercharger,
delivering 1,380 hp (1,030 kW), 2,218 hp (1,655 kW) WEP with Water methanol injection,
driving a Hamilton Standard constant-speed, variable-pitch three blade propeller with
a 11 ft 2 in (3.40 m) diameter
Performance:
Maximum speed: 472 mph (760 km/h; 410 kn) at 21,200 ft (6,500 m)
Cruise speed: 362 mph (315 kn, 580 km/h)
Stall speed: 100 mph (87 kn, 160 km/h)
Range: 1,650 mi (1,434 nmi, 2,755 km) with external tanks
Service ceiling: 41,900 ft (12,800 m)
Rate of climb: 3,200 ft/min (16.3 m/s)
Wing loading: 39 lb/sqft (192 kg/m²)
Power/mass: 0.18 hp/lb (300 W/kg)
Lift-to-drag ratio: 14.6
Recommended Mach limit 0.8
Armament:
4× 0.50 caliber (12.7mm) AN/M2 Browning machine guns with 400 RPG
A pair of underwing hardpoints for a pair of drop tanks
or bombs of 100 lb (45 kg), 250 lb (113 kg) or 500 lb (226 kg) caliber
The kit and its assembly:
A project that was more complex than obvious at first glance. The plan was to create a “missing link” between the WWII P-51D and its lightweight sibling P-51H, which came too late in WWII to take seriously part in any combat. There actually were some “interim” designs, which paved the way (the F, G and J models), with lightweight hulls or different engines. My plan was to adopt some details of these aircraft to create the fictional P-51E.
For a look that subtly differs from the well-known P-51D I decided light-headedly to bash two Academy models together: a P-51D hull, mixed with the wings and tail from a P-51B/C kit, plus some inter-kit and external donors. What sounds simple turned out to be a major surgery task, though, because both kits are totally different, produced with individual moulds and few interchangeable parts! Even details which you’d expect to me identical (e. g. wing tip and tail shape) differ markedly.
For the P-51E kitbash the fuselage with cockpit, engine and radiator bath was taken from the P-51D, while the tail and the wings were taken from the P-51B/C, because they were slightly bigger, “edgier”, lacked the fin fillet and featured only four machine guns in the wings. Mating these parts called for many adaptations and massive PSR, though. To change the look further I removed the small wing leading edge extensions, for a completely straight edge, and the cowling was changed to look like a mix of the P-51F and J prototypes. The carburetor intake disappeared and a part of the P-51D spinner was used to extend the fuselage a little. A completely new three-blade propeller was scratched, using a Yokosuka D4Y spinner, a piece from an ESCI Ka-34 Hokum main rotor, and clipped blades from a Hasegawa F5U. A styrene tube was added to hold the propeller’s new metal axis. To compensate for the longer nose the rear fuselage a 2mm section of the P-51D hull was retained in front of the transplanted P-51B/C tail (which is a separate hull section, the -D has an integral tail).
The original exhausts were replaced with resin aftermarket pieces for P-400 Airacobra from Quickboost - for which the nose extension paid out, because the V-1710 exhaust arrangement is longer than the Merlin's.
Painting and markings:
I wanted a typical, potentially colorful USAAF livery from early 1945 for this what-if aircraft model. This meant that the aircraft would have a NMF livery, and Invasion Stripes or other ID markings were already removed or not applied to new aircraft anymore. Camouflage had been omitted from 1945, too. As squadron markings I went for the 357th FG red-and-yellow nose markings; these came with Academy’s P-51B/C kit, but I replaced them with decals from a Mistercraft/Intech kit from The Stash™ because their shape was simpler and would (probably) better match the modified lower nose. Searching for later P-51Ds of this group revealed that the aircraft hardly carried any other colorful marking, though – just the tactical code, and maybe some personal markings.
To keep in style I adapted this basis, using a tone called “White Aluminum (RAL 9006)” from a Duplicolor rattle can as an overall basis, but added a thin red edge to the olive drab (Revell 46) anti-glare panel, created with generic decal stripes. The rudder as well as the wing tips were painted in red, an official 363rd FS ID marking, as a counterbalance to the prominent nose, too.
The propeller spinner was painted free-handedly, in an attempt to match the checker decal's colors. Some hull panels were painted in a darker shade of aluminum to make the model look mo0re lively, and some post-shading with Humbrol Matt Aluminum Metallizer was done to improve that effect, too. Cockpit and landing gear wells were painted in a bright green zinc chromate primer tone.
Decals and markings were puzzled together from various sources. Finding a suitable 'B6' code fpr the 363rd FS was tough, but I was eventually able to scratch it from 'P9' codes from two Academy P-47D kits/sheets! BTW, the horizontal bar above the aircraft's individual letter was a real world marking for a second aircraft that bore this tactical code within the unit. The nose art/tag was also donated from an Academy P-47, the yellow font matches the rest of the unit colors well.
The anti glare panel and the propeller blades received a matt varnish coat, while the rest of the hull was covered with a mix of matt and a little semi-gloss varnish - contemporary Mustang photos from 1945 suggest that, despite being bare metal, the aircraft were not polished or shiny at all, yet the aluminum would have some reflections. I think that the final overall finish looks quite good. As a final step I added some light soot stains behind the exhausts and the machine gun orifices, and dry-brushed some silver on edges/areas where paint could have flaked in real life. Not much, but it adds to the overall impression of a used aircraft.
A more demanding project than meets the eye. Bashing the two Mustang kits for a fictional new one might have been a smart idea, but it turned out to be a nightmare because the two 1:72 Mustand Academy kits are totally incompatible. Additionally, the mods I made are VERY subtle, it takes a keen eye to recognize the lengthened hull, the modfied cowling and the cleaner tail. The three-blade prop is the most obvious thing, and with it, from certain angles, the P-51E reminds somewhat of a Yak-9? Probably due to the intake-less cowling and the (for a Mustang) unusual prop? The livery looks plausible and colorful, though. :D
Outside of Price and Helper there is a very small seasonal waterfall; sometimes it is a trickle, other times totally nonexistent. On the way by it in November 2017 we noticed it was not a pretty decent frozen waterfall. We made an immediate stop and pulled over to check it out - very nice. Unfortunately the lighting never seems to be in our favor. One day we will luck out!
A relatively recently described species, the Talladega Seal Salamander lives in flowing rocky streams of the Georgia Piedmont and Talladega Mountains. This species was once considered Desmognathus monticola but can be distinguished by the almost nonexistent pattern in adults.
Originally built between 1793 and 1797 during the Second Spanish Period, this Spanish Colonial and Neoclassical-style cathedral is the fourth church to occupy a prominent position at the heart of the city of St. Augustine. The original church, built of flammable materials, stood from 1565 until 1586, when it was burned during an attack by English Privateer Sir Francis Drake. Not even a year later, the church was rebuilt of palm logs, with a straw roof, which succumbed to fire in 1599. In 1605, thanks to a tithe from Spain, a timber church was constructed, which stood until a failed English attack on the city in 1702 by James Moore, then-governor of Carolina colony. There were attempts to rebuild the church during the First Spanish Period, starting in 1707, but these went nowhere, and the money intended for the church’s reconstruction were misallocated by corrupt officials. Instead, during the remainder of the First Spanish Period, mass was held in the St. Augustine Hospital. Following the transfer of governance of Florida to the British in 1763, the need for a new Catholic church was nonexistent, as the catholic population of the colony fled to other Spanish colonies. At the start of the Second Spanish Period in 1784, the need for a new church became more apparent, and work on the current cathedral’s Coquina stone walls began in 1793. The facade of the church features Neoclassical elements around the front doorway, with the Spanish Colonial style being employed on the roofline and limited fenestration on the front facade. The church stood in its original configuration until a fire in 1887 destroyed the timber roof structure and did major damage to the interior. Following the fire, Henry Flagler led the effort to have the cathedral rebuilt, with James Renwick, Jr. designing an expansion of the old building, giving it a rectangular cruciform layout, and adding the Spanish Renaissance-style bell tower and European-style transept to the building. The interior was rebuilt to feature exposed decorative timbers that supported the roof structure, and a decorative polychromatic tile floor. The building has since received a few more additions, which house a chapel, service areas, and offices, as well as a building to the rear of the cathedral along Treasury Street, built in the Mediterranean Revival style, which houses the offices of the Diocese of St. Augustine. Today, the cathedral remains a prominent landmark in the city, and was listed on the National Register of Historic Places and listed as a National Historic Landmark as part of the St. Augustine Town Plan Historic District in 1970.
FGR - ads for nonexistent products
breakfast of champs , pft so last season .
contants of this brave drink : orange juice and coke (easyyyy as pie)
story : i was in truro on a trip . me and kayla were bored so we made drinks . and it was SO good but SO gross looking , and replusive ahah . it had skittles , nerds , vanilla coke , ummm oh man so manyyyyy other things lol .
we will be in vancouver for three days, august 5 through 7 and would love to meet up with flickr folk before ferrying over to vancouver island for almost two weeks of camping. let me know by flickr mail if you're interested.
after friday, internet connection will be iffy-to-nonexistent...will be back on the 20th, with many images...
When I drove by this slightly dilapidated white barn, I just had to pull over. What caught my attention was a red barn framed by its nonexistent doors. I could've just capture the framed red barn, but I liked how the two are positioned relative to one another. To get a better frame, I needed a ladder. Since I wasn't too keen on standing on top of the car either, I had to settle for this. I'll return with a ladder next time.
I'm usually not a fan of selective coloring, but I think it works here. If it's good enough for Spielberg, it's good enough for me! :-) More importantly, this allowed me to put into practice what Jeff has taught me about working with layers and masks.