View allAll Photos Tagged pigmentation
Leuzismus (von altgr. λευκός leukós „weiß“) ist eine Defekt-Mutation bei Tieren, die dazu führt, dass das Fell weiß und die darunterliegende Haut rosa sind, da die Haut keine Melanozyten (farbstoffbildende Zellen) enthält. Im Gegensatz dazu sind beim Albinismus die Zellen zwar vorhanden, aber unfähig, den Farbstoff Melanin zu bilden. Die meisten Formen der Scheckung sind auf abgeschwächte Formen des Leuzismus zurückzuführen.
de.wikipedia.org/wiki/Leuzismus
Leucism is a wide variety of conditions which result in the partial loss of pigmentation in an animal—which causes white, pale, or patchy coloration of the skin, hair, feathers, scales or cuticles, but not the eyes. It is occasionally spelled leukism.
'Leucism' is often used to describe the phenotype that results from defects in pigment cell differentiation and/or migration from the neural crest to skin, hair, or feathers during development. This results in either the entire surface (if all pigment cells fail to develop) or patches of body surface (if only a subset are defective) having a lack of cells that can make pigment.
Since all pigment cell-types differentiate from the same multipotent precursor cell-type, leucism can cause the reduction in all types of pigment. This is in contrast to albinism, for which leucism is often mistaken. Albinism results in the reduction of melanin production only, though the melanocyte (or melanophore) is still present. Thus in species that have other pigment cell-types, for example xanthophores, albinos are not entirely white, but instead display a pale yellow colour.
More common than a complete absence of pigment cells is localized or incomplete hypopigmentation, resulting in irregular patches of white on an animal that otherwise has normal colouring and patterning. This partial leucism is known as a "pied" or "piebald" effect; and the ratio of white to normal-coloured skin can vary considerably not only between generations, but between different offspring from the same parents, and even between members of the same litter.
Salares Boliviani : Laguna Colorada
La Laguna Colorada (Laguna Rossa) è un lago salato poco profondo nel SudOvest dell'Altipiano boliviano all'interno della Riserva Nazionale di Fauna Andina "Eduardo Avaroa" e vicino al confine con il Cile
La presenza, all'interno del lago, di isole di borace dal colore candido crea un forte contrasto con il rosso/arancio (a seconda delle ore del giorno) delle acque dovuto a sedimenti rossi e alla pigmentazione di alcune alghe che attirano qui una numerosa colonia di fenicotteri andini.
Laguna Colorada (Red Lagoon) is a shallow salt lake in the southwest of the altiplano of Bolivia, within Eduardo Avaroa Andean Fauna National Reserve and close to the border with Chile. The lake contains borax islands, whose white color contrasts with the reddish color of its waters, which is caused by red sediments and pigmentation of some algae. James's Flamingos abound in the area.
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In this one you can see a part of that special stretchy tissue called ventral groove blubber attached to their lower jaw or mandible of the Humpback Whale that I've been telling you about. When they lower their jaws to extreme angles and swim very quickly while feeding on small fish and krill, a drag force on this blubber causes it to expand to encompass a volume that can be almost as big as the whale itself.
But that's not what makes this photo so special to me. Perhaps you thought I altered the photo in some way ... selective colouring as you've no doubt seen in some photos. Well, I don't even know how to do that ... and, furthermore, I wouldn't do it anyway even if I did know how. No. What you're seeing here is what I saw ... what the camera saw. No embellishments whatsoever!
I've seen quite a few Humpbacks over the years ... but nothing like this! At first I thought it might have been some organic growth in the grooves of the lower jaw ... akin to barnacles. But on closer inspection it seems too regular for that. Then I thought it might be as a result of it being stretched so much ... blood showing through? Don't think so, though. So, maybe some pigmentation aberration?
Whatever it is, it makes for a very interesting photo. You have to check out the larger version. Also, I have a number of shots of this whale. Not just this one. In one of them, this ventral groove blubber is stretched even bigger!
By the way, there are four whales visible in the photograph.
Enjoy!
Something different.
The city of Edmonton, Alberta has the largest Black-billed Magpie population of any city in the world, and the the largest occurrence of leucism within a population of Black-billed Magpies.
According to Wikipedia: Leucism is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes.
The ruffled feathers on this guy were caused by a sudden wind gust while I was photographinh it.
Edmonton, Alberta.
We live in a colorful world, filled with a wide assortment of pigmentation. From the flowers to the sky, the humans to the skyscrapers — every facet of life is painted with a variety of colors. Maybe this is by mistake. Maybe it’s on purpose. Either way, this fact is to our good fortune, because to exist in a monotonous world — a world lacking in diversity — sure wouldn’t be as beautiful or interesting...
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Splash of Paint | Texas Hill Country | Spring 2019
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Together with Frans & Marina looking for springtails between heather bushes in Opglabbeek(Louwel). It's so much more enjoyable to do together than on your own ! :-)
Perhaps it didn't rain enough, because we found only Entomobrya sp. We're going to try again some other time.
♁ Speckled Bush-Cricket / Punktierte Zartschrecke (Leptophyes punctatissima)
I find their delicate form, pigmentation and patterns fascinating.
The white tiger is a pigmentation variant of the Bengal tiger, which is reported in the wild from time to time in the Indian states of Assam, West Bengal and Bihar in the Sunderbans region and especially in the former State of Rewa. Such a tiger has the black stripes typical of the Bengal tiger, but carries a white or near-white coat.
* Chinchilín, Leucism Greater Antillean Grackle (Quiscalus niger) (Rc)
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Leucism is a condition in which there is partial loss of pigmentation in an animal resulting in white, pale, or patchy ...
Lugar de Observacion / Taken: Universidad Autonoma de Santo Domingo (UASD), Republica Dominicana.
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Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Passeriformes
Family:Icteridae
Genus:Quiscalus
Species:Q. niger
Binomial name
Quiscalus niger
Anthocharis cardamines, the orange tip, is a butterfly in the family Pieridae, which contains 1100 species of butterfly. A. cardamines is mainly found throughout Europe and temperate Asia (Palearctic) The males feature wings with a signature orange pigmentation
Galloways in verschneiter Landschaft.
Ein wesentliches Merkmal der Galloways ist ihr doppelschichtiges Fell mit langem, gewelltem Deckhaar und feinem, dichtem Unterhaar. Dies und ihre vergleichsweise dicke Haut sowie der angepasste sparsame Stoffwechsel machen die Galloways besonders widerstandsfähig. Deshalb können sie ohne Probleme auch harte Winter im Freien überstehen. Gezüchtet werden Galloways heute weltweit in den Pigmentierungen „black“ (schwarz), „dun“ (falb, gelbbraun) und „red“ (rot-braun).
Galloways in the snowy landscape.
A key feature of Galloways is their double-layered coat with a long, wavy topcoat and fine, dense undercoat. This and their comparatively thick skin as well as the adapted thrifty metabolism make the Galloways particularly hardy. This is why they can survive harsh winters outdoors without any problems. Today, Galloways are bred worldwide in the pigmentations "black" (black), "dun" (fawn, yellow-brown) and "red" (red-brown).
Norddeutschland | Northern Germany | Schleswig-Holstein.
Native to the Americas and befitting any royal Egyptian necklace or coffin, the golden tortoise beetle is a species of insect with a rounded, domed body.
This beetle has a unique ability to change the shade of its pigmentation from bright to dull gold using microscopic cavities in its cuticle.
When threatened, the beetle presses its body close to the leaf surface, then tucks its appendages underneath its body like a tortoise.
Golden tortoise beetles are herbivores, feeding on plants in the Convolvulaceae family.
5 mm in length.
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Taken back in the spring of 2007, here's "Houdini" looking at me suspiciously, probably wondering what I'm holding in front of my face. Houdini was born the previous summer, about 9 months before this was taken. Although he looks albino, he's actually leucistic... a condition similar in appearance but with some pigmentation present... usually in the eyes. Albino creatures have a total lack of melanin resulting in very light pinkish eyes. Houdini, like a number of leucistic deer in the herd had normal eyes, fully pigmented.
Here's a photo of Houdini taken 6 years later:
api.flickr.com/photos/61377404@N08/10062491784/in/album-7...
Sadly, Houdini and three other bucks were taken by a poacher over a four week period in early 2014. He was apprehended and justice was served, just not as much as he deserved.
This photo was taken with my second digital camera, a Kodak DX6490 point & shoot that had a great zoom lens and was small enough to carry in a jacket pocket. It didn't have image stabilization but was super easy to use and many of the best deer pictures I took were with this camera. The zoom lens wasn't used so much to get closer, but more to allow precise framing.
100-2645T FB
I had my first ever encounter with a leucastic hawk today in Marin County. A brief encounter it was, but what a treat! A short explanation of leucism cribbed form the website thespruce.com: Leucism, or leukism, reduces pigmentation in birds, preventing melanin from being properly deposited in the feathers or skin. Leucism is an abnormal condition resulting from a genetic mutation that causes birds to appear white or faded in color, either fully or in patches.
The adult humpback whale is generally 14–15 m (46–49 ft) long, though individuals up to 16–17 m (52–56 ft) long have been recorded. Females are usually 1–1.5 m (3 ft 3 in – 4 ft 11 in) longer than males.
The species can reach body masses of 40 metric tons (44 short tons). Calves are born at around 4.3 m (14 ft) long with a mass of 680 kg (1,500 lb)] The species has a bulky body with a thin rostrum and proportionally long flippers, each around one-third of its body length.[14][15] It has a short dorsal fin that varies from nearly nonexistent to somewhat long and curved.
Like other rorquals, the humpback has grooves between the tip of the lower jaw and the navel. The grooves are relatively few in number in this species, ranging from 14 to 35. The upper jaw is lined with baleen plates, which number 540–800 in total and are black in color.
The dorsal or upper side of the animal is generally black; the ventral or underside has various levels of black and white coloration. Whales in the southern hemisphere tend to have more white pigmentation. The flippers can vary from all-white to white only on the undersurface. Some individuals may be all white, notably Migaloo who is a true albino. The varying color patterns and scars on the tail flukes distinguish individual animals.[
The end of the genital slit of the female is marked by a round feature, known as the hemispherical lobe, which visually distinguishes males and females.
Unique among large whales, humpbacks have bumps or tubercles on the head and front edge of the flippers; the tail fluke has a jagged trailing edge. The tubercles on the head are 5–10 cm (2.0–3.9 in) thick at the base and protrude up to 6.5 cm (2.6 in).
They are mostly hollow in the center, often containing at least one fragile hair that erupts 1–3 cm (0.39–1.18 in) from the skin and is 0.1 mm (0.0039 in) thick. The tubercles develop early in gestation and may have a sensory function, as they are rich in nerves. Sensory nerve cells in the skin are adapted to withstand the high water pressure of diving.
In one study, a humpback whale brain measured 22.4 cm (8.8 in) long and 18 cm (7.1 in) wide at the tips of the temporal lobes, and weighed around 4.6 kg (10 lb). The humpback's brain has a complexity similar to that of the brains of smaller whales and dolphins.
The structure of the eye indicates that eyesight is relatively poor, being only able to see silhouettes over long distances and finer details relatively close. Computer models of the middle ear suggest that the humpback can hear at frequencies between 15 Hz and 3 kHz "when stimulated at the tympanic membrane", and between 200 Hz and 9 kHz "if stimulated at the thinner region of the tympanic bone adjacent to the tympanic membrane". These ranges are consistent with their vocalization ranges.
As in all cetaceans, the respiratory tract of the humpback whale is connected to the blowholes and not to the mouth, although the species appears to be able to unlock the epiglottis and larynx and move them towards the oral cavity, allowing humpbacks to blow bubbles from their mouths. The vocal folds of the humpback are more horizontally positioned than those of land mammals which allows them to produce underwater calls. These calls are amplified by a laryngeal sac.
This image was taken in Reykjavik, Iceland
The adult humpback whale is generally 14–15 m (46–49 ft) long, though individuals up to 16–17 m (52–56 ft) long have been recorded. Females are usually 1–1.5 m (3 ft 3 in – 4 ft 11 in) longer than males.
The species can reach body masses of 40 metric tons (44 short tons). Calves are born at around 4.3 m (14 ft) long with a mass of 680 kg (1,500 lb)] The species has a bulky body with a thin rostrum and proportionally long flippers, each around one-third of its body length.[14][15] It has a short dorsal fin that varies from nearly nonexistent to somewhat long and curved.
Like other rorquals, the humpback has grooves between the tip of the lower jaw and the navel. The grooves are relatively few in number in this species, ranging from 14 to 35. The upper jaw is lined with baleen plates, which number 540–800 in total and are black in color.
The dorsal or upper side of the animal is generally black; the ventral or underside has various levels of black and white coloration. Whales in the southern hemisphere tend to have more white pigmentation. The flippers can vary from all-white to white only on the undersurface. Some individuals may be all white, notably Migaloo who is a true albino. The varying color patterns and scars on the tail flukes distinguish individual animals.[
The end of the genital slit of the female is marked by a round feature, known as the hemispherical lobe, which visually distinguishes males and females.
Unique among large whales, humpbacks have bumps or tubercles on the head and front edge of the flippers; the tail fluke has a jagged trailing edge. The tubercles on the head are 5–10 cm (2.0–3.9 in) thick at the base and protrude up to 6.5 cm (2.6 in).
They are mostly hollow in the center, often containing at least one fragile hair that erupts 1–3 cm (0.39–1.18 in) from the skin and is 0.1 mm (0.0039 in) thick. The tubercles develop early in gestation and may have a sensory function, as they are rich in nerves. Sensory nerve cells in the skin are adapted to withstand the high water pressure of diving.
In one study, a humpback whale brain measured 22.4 cm (8.8 in) long and 18 cm (7.1 in) wide at the tips of the temporal lobes, and weighed around 4.6 kg (10 lb). The humpback's brain has a complexity similar to that of the brains of smaller whales and dolphins.
The structure of the eye indicates that eyesight is relatively poor, being only able to see silhouettes over long distances and finer details relatively close. Computer models of the middle ear suggest that the humpback can hear at frequencies between 15 Hz and 3 kHz "when stimulated at the tympanic membrane", and between 200 Hz and 9 kHz "if stimulated at the thinner region of the tympanic bone adjacent to the tympanic membrane". These ranges are consistent with their vocalization ranges.
As in all cetaceans, the respiratory tract of the humpback whale is connected to the blowholes and not to the mouth, although the species appears to be able to unlock the epiglottis and larynx and move them towards the oral cavity, allowing humpbacks to blow bubbles from their mouths. The vocal folds of the humpback are more horizontally positioned than those of land mammals which allows them to produce underwater calls. These calls are amplified by a laryngeal sac.
This image was taken in Reykjavik, Iceland
#DoodlewashSeptember2022 prompt: Reflections.
Did you know there are rare flamingoes that stay white even when eating the correct diet? They aren't albinos, but suffer from leucism, a lack of pigmentation. There has also been at least one known case of a black flamingo, which has melanism.
* Hahnemühle Hot Press The Collection Watercolor paper
* Supervision Watercolors
* Image inspiration - photo by Schwoaze on Pixabay.
@Hahnemühle_USA @Hahnemuehle_USA @supervisionart #LifeImitatesDoodles #Doodlewash #WorldWatercolorGroup
African golden Arab, (Colotis aurigineus), veined gold or double-banded orange, is a butterfly of the family Pieridae.
This stunning butterfly ranges from the Horn of Africa south to at least Tanzania, Malawi, and Zambia. The wingspan is roughly 5 cm. This individual is curiously asymetrical in the intensity of the orange pigmentation in the wings.
Captured during a photography safari on a early morning game drive in Tarangire National Park, Tanzania.
Compare the color with the previous photos. Leucism is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes.
Autumn was settling in along the Little Truckee River. The aspens and grasses were displaying their seasonal pigmentation. All felt good that day.
Eristalis tenax, the common drone fly, is a common, migratory, cosmopolitan species of hover fly. It is the most widely distributed syrphid species in the world, and is known from all regions except the Antarctic. It has been introduced into North America and is widely established. It can be found in gardens and fields in Europe and Australia. It has also been found in the Himalayas.
Eristalis tenax is a large, stocky bee mimic. The eyes are marbled in black. Males have hovering displays. The average wing length is 9.75–13 mm and their average wingspan is 15 mm.
The exact appearance of the drone fly can vary considerably. The abdomen can vary in color from dark brown to orange. Pigmentation has an important role in the control of body temperature; the black areas down the center of the drone-flies abdomen may absorb solar radiation and so warm the dorsal blood vessel, which is right underneath.
From Wikipedia, the free encyclopedia
I'm trying to do dorsal shots of the Entomobrya sp. in my garden. This is I think : Entomobrya intermedia. The left one did not show me the pigmentation in dorsal aspect.
A beautiful unique Robin with leucism.
Leucism is a condition in which there is partial loss of pigmentation in an animal—which causes white, pale, or patchy coloration of the skin, hair, feathers, scales or cuticle, but not the eyes.
From: Wikipedia
Looking through some photos taken in previous years and came across this one which I had not processed.
Definition of leucism
: an abnormal condition of reduced pigmentation affecting various animals (such as birds, mammals, and reptiles) that is marked by overall pale color or patches of reduced coloring and is caused by a genetic mutation which inhibits melanin and other pigments from being deposited in feathers, hair, or skin
Not really, this is a tulip tree flower. There is a small row of mature tulip trees (Liriodendron tulipifera) along the river Avon in the city centre. The trees are named due to showy flowers superficially resembling tulips during spring and with a beautiful rusty orange foliage in autumn. The peak of flowering season had passed at the time of the visit and most of the flowers were at the top of tree canopies. I was lucky to find one flower lower enough to take a shot with the Abbey in the background.
The scientific name Liriodendron the Greek words ‘leirion’ and ‘dendron’ meaning lily and tree, respectively. The scientific epithet ‘tulipifera’ translated from the Latin as ‘tulip-bearing’. This species is native to eastern North America, whereas L. chinense is native to China, the latter lacks the red pigmentation in flowers. Both species belongs to Magnolia family and widely cultivated in different parts of the world. Bath, BANES, England, UK.
Thank you very much for your visits, comments and favours, always much appreciated.
This is a leucistic male American Avocet, proud father of 2 growing chicks. Avocet chicks leave the nest the day they hatch and forage for their own food on day 1. Mom and Dad's role is to fend off predators through distraction, chasing and sometimes just attacking. And this papa takes is role VERY seriously. He'd chase of any bird or animal that got even remotely close to his chicks. He'd even employ the old broken wing trick (before this year, I thought that trick was limited to killdeer, but apparently other shorebirds employ that trick.) In this shot, Papa had just chased off a black-necked stilt and was on his way back to his babies.
If you're unfamiliar with the term leucistic, it means it has leucism, where the bird or animal has partial loss of pigmentation. Normally his head would be a solid copper color this time of year, but instead it's sort of a mottled white and copper color.