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Migrating neurons (arrows) have no sense of direction (bottom) without the LAD-2 cell adhesion molecule. (JCB 180(1) TOC2)
This image is available to the public to copy, distribute, or display under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported license.
Reference: Wang et al. (2008) J. Cell Biol. 180:233-246.
Published on: January 14, 2008.
doi: 10.1083/jcb.200704178.
Read the full article at:
There are two species of winter migrating butterflies in the world, the Mexican Monarch Butterflies and the Taiwanese Purple Crow Butterflies (Euploea tulliolus). Maolin's Purple Butterfly Valley is a very rare and special place in the natural world – a winter home for butterflies that migrate from colder areas every year. In Butterfly Valley, one might see hundreds of thousands of butterflies: Dwarf Crows, as well as Striped Blue Crows, double-branded Black Crows, Chocolate Tigers and six or more other species.
Taking a walk in a park one afternoon, was rewarded with flocks of birds and marvelous clouds. Maybe you care to view large so you can see how many birds were passing by. I chose this photo because the cloud seemed to be exploding and the colors were so unusual. These clouds were on the East.
All rights reserved. Please do not use or reproduce this image on websites, blogs or any other media without my permission.
Dall sheep in Denali migrate from the inner ranges to the outer ranges in the fall. This group of Dall Ewes is crossing the Tolklat River to gain access to the outer range where the winter weather is not as severe.
The migration has its hazards, the sheep easily outpace bears and wolves on the steep mountain slopes but are vunerable in the lowlands.
Millions of migrating birds annually nest and raise young on Wrangel Island during the long daylight hours of the arctic summer.Fifty species of migratory birds and waterfowl come to the islands each year. Eight kinds of seabirds nest in large rookeries on the cliffs and rocky shores of the islands including guillemots and puffins. The blacklegged kittiwake, pelagic cormorants and glaucous gull are common birds, feeding on the abundance of fish and marine invertebrates in the relatively shallow waters. Arresting color in the Arctic is found more often in the huge skies with its vivid twilights.
There were two large groups of Sandhill Cranes using Kensington as a stopover today!
Kensington Metro Park, MI
Migrate 2D design intent to 3D: New methods in Solid Edge St3, take manufacturing dimensions from 2D drawings and migrate them to 3D Driving dimensions on imported 3D models. Shown are newly added manufacturing dimensions such as distance between holes and overall height across multiple features, and let designers edit what’s important This technique let’s designers better reuse 2D and 3D models form systems like SolidWorks, Inventor, or Pro/E.
An unusual cloud 70 miles across was detected by radar this week above Denver Colorado. Meteorologits thought the cloud was comprised of migrating birds and asked people in the area to look to the skies to identify the species. They got many replies, each one saying that the cloud was butterflies. It turns out the cloud comprised millions of Painted Lady butterflies (Vanessa cardui, not the American Painted Lady- V. virginiensis). Radar gives a different signature with larger objects as the reflectivity is higher, and this butterfly cloud had a signature of low reflectivity, which showed red on their radars. Here is the mention on BBC news: www.bbc.co.uk/news/world-us-canada-41528521
This is the same species of Painted Lady that occurs across Britain and Europe (and beyond). Our British ones migrate south to North Africa for the winter. I'm guessing that American butterflies overwinter in Mexico and Central America but I cannot find anything that confirms that.
Back to this photograph which I took at the northern tip of Vancouver Island in Canada. I don't often see Painted Ladies in British Columbia but this year I saw dozens. Its numbers are known to fluctuate greatly so 2017 was a good year for a massive butterfly cloud to occur.
This very large lake sits beside the I-80 exit ramp to Grand Island, Nebraska. The birds are snow geese, tens, maybe hundreds, of thousands of them. The sight and sound were mind blowing... astonishing.. It was like something you see in a nature documentary, not real life! Obviously, see large and scroll for the best effect.
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Warrakilla.
George Woodroffe Goyder migrated to the colony of New South Wales in 1848 at the age of 22 years and settled in Melbourne in the Port Philip District. In 1851 George Goyder relocated to Adelaide to meet up with the Smith family from England who were members of the New Church or the Swedenborg Church like he was. Both Goyder’s father and uncle were ministers in the New Church in England. He entered the SA public service in that year and later in the year he married Frances Mary Smith at Christ Church Anglican in North Adelaide followed by an unofficial wedding ceremony in the New Church in Carrington Street Adelaide. From 1851 onwards Goyder worked in the drafting office of the SA public service and in 1855 he was promoted to General Superintendent of Field Surveys and First Assistant to the Surveyor General. Then in 1857 he wrote a diary on his explorations to the north of the state. His explorations were reported in the press and Goyder become a known figure. The State Library has a copy of his original 1857 diary which in simply marked 1857 Dy (for diary) Sr O (Survey Office). His survey took him to the Pitchi Richi gorge, the Willochra Plains and the Flinders Ranges. Goyder and three others went further and discovered a large freshwater lake teeming with ducks, birds and wildlife which was Lake Blanche. Goyder made the mistake of thinking the lake always had fresh water and he never overestimated the nature of the South Australian countryside again. His boss Surveyor General Freeling had travelled around Lake Blanche before and had only found desert and his assessment was the correct one. Despite this error Goyder was appointed as Surveyor General of SA upon Freeling’s retirement in 1861 as well as Valuator of Runs and Inspector of Mines. Goyder held these posts and others until his own retirement in 1894 just a few years before his death in 1898. But before he retired Goyder bought the old Wheatsheaf Inn at Mylor in 1879. He then commissioned well known Adelaide architect Daniel Garlick to design him a grand Italianate house with several bay windows and 14 main rooms plus work rooms, cellar, stables etc on his 80 acre estate. The house which Goyder named Warrakilla was completed in 1883 when Goyder and his family took up residence on this magnificent country estate. Goyder was interested in tree conservation and the property had extensive river flats along the Onkaparinga. After his own death in 1898 his second wife Ellen died not long after in May 1899 and Warrakilla was put up for public auction in the Adelaide Town Hall in December 1899 but it appears son David John Goyder stayed on the property at Warrakilla until he sold it in 1907. After several short term owners the property was acquired by the Ernest Crafter family in 1924 and they kept the property more than 30 years. This grand house has been partially destroyed by fire twice including in the 1983 Ash Wednesday bushfires but it has been rebuilt as it was. The current owners feel sure George Goyder still roams the house as lights sometimes light up the front living room. The house is surrounded by a grand garden with English trees that date from Goyder’s ownership and above the front door a sand blasted picture of Warrakilla and the name enhances the entrance. Perhaps because of his great significance to the state of South Australia previous owners have maintained an interesting set of framed photographs of the Surveyor General Goyder on the walls of the sitting room. His linkages to this great house have not been forgotten.
The old Wheatsheaf Inn was opened in 1842 after William Warland purchased an original 80 acre section there in 1841. Many people called the inn Warland’s Hotel. It prospered because it was on the main road from Adelaide to Strathalbyn and gold was discovered along the Onkaparinga near here from 1852 with later much bigger gold finds at Echunga, Biggs Flat and Jupiter’s Creek from 1868. One of Goyder’s many roles was Inspector of Mines and he was undoubtedly well aware of the Warrakilla gold mine along the Onkaparinga at Mylor on the way to Hahndorf. It operated in 1852 only half a mile from Warland’s Wheatsheaf Inn according to Mr W.Chapman of Echunga who discovered the first gold there upon his return from the Victorian goldfields in 1852. One Adelaide Hills historian also claims that Goyder and his new bride stayed at the Wheatsheaf Inn after their marriage in November 1871 and it was known as a popular spot for honeymooners in the 1870s. Their son John Harvey Goyder was born 10 months after their marriage so perhaps he was conceived there? Perhaps this partly explains why Goyder purchased the Wheatsheaf Inn in 1879 and renamed it Warrakilla House. His links with the district were immediately cemented by Ellen Goyder laying the foundation stone of the Echunga Institute in 1879 and Goyder himself conducting the official opening of it in 1880.
Canada Geese (Branta canadensis)
Wagbachniederung, Germany_w_0339
In 2009, US Airways Flight 1549 struck a flock of Canada geese, forcing pilot Chesley "Sully" Sullenberger to land the plane on the Hudson River, New York.
Migrating Canada geese, in their iconic v-formations, can fly an astonishing 1,500 miles in just 24 hours. They can also waddle indefinitely around your local office park.
In recent years, more people across the United States and Canada have noticed the noisy black-and-white-headed birds taking up residence year-round on golf courses, lawns, and other green spaces. Have these geese, perhaps encouraged by milder winters and easy suburban living, simply stopped flying south? In many cases, yes—but the explanation is complicated.
In the classic migration pattern, flocks that wintered in the southern U.S. fly north in the spring, returning to the same spots in the high and sub-Arctic to breed and nest. In September and October, these flocks head south again—with a new generation in tow. With an average life span of 24 years, members of this species may make two dozen migrations in a lifetime, using the same “rest stops” along the way.
But there are exceptions. Even before Europeans settled the Americas in the 1600s, some members of this species—which was later named Canada goose (not “Canadian”) by Carl Linnaeus in 1758—never migrated.
These populations nested in a swath of habitat ranging from the Great Lakes to the Rocky Mountains, moving only far enough south each winter to find food and open water. When Europeans arrived, they discovered these so-called resident geese were easy pickings, and nearly wiped them out by the early 1900s.
A half-century later, conservationists and government agencies reintroduced captive-bred birds across their former northern U.S. range, and, boosted by a few surviving flocks, resident Canada geese made an astonishing comeback.
Today the nine-pound birds live in every Canadian province and state in the continental U.S.—and their populations continue to grow. In the 1950s, about a million called North America home; that number has since ballooned to seven million, according to estimates by the Canadian Wildlife Service. (The birds are also booming in Europe and New Zealand, where they are an invasive species.)
One of a series of fourteen hand-forged artworks, dotted along a trail beside the River Colne in the old port area of Colchester ( The Hythe). They are the work of a group of artists ( Andrew Rowe, David Mackie, Heather Parnell and Becky Adams) who worked with members of the local community to produce the sculptures. The trail begins ( or ends) at firstsite, the new arts' devlopment in Colchester town centre , which will open to the public on 25 September 2011.
The sculptures represent various aspects of either the wildlife or local history of the area and the whole trail is described in a specially written poem by Martin Newell of Wivenhoe, in which he assigns a verse to each sculpture. The details ( including a map of the trail) are available locally in Colchester.
Migrate is described in Martin Newell's verse :
Swallows and swifts migrate
When the Essex summer's fled
And the winter sun comes late
Waiting for the whooper swan.
Millions of migrating birds annually nest and raise young on Wrangel Island during the long daylight hours of the arctic summer.Fifty species of migratory birds and waterfowl come to the islands each year. Eight kinds of seabirds nest in large rookeries on the cliffs and rocky shores of the islands including guillemots and puffins. The blacklegged kittiwake, pelagic cormorants and glaucous gull are common birds, feeding on the abundance of fish and marine invertebrates in the relatively shallow waters.Arctic landscapes have been described as close-toned land...the tones are lighter than tones of midday sky...except for a brief few weeks in autumn, the arctic is without colour. Its land colours are the colors of deserts, the ochres and siennas of stratified earth, the grey-greens of sparse plant life on bare soil. On closer inspection, however, the monotonic rock of the polar desert is seen to harbor the myriad greens, reds, yellows and oranges of lichens. Occasionally there is brilliant coloring as with wildflowers in the summer. Arresting color in the Arctic is found more often in the huge skies with its vivid twilights.
Some sandhills spend 4 months of each year in migration. The birds spend much time on unfamiliar terrain, where they are vulnerable to accidents. When you are a crane with a broken wing, you don't go to the hospital, you die. Among sandhill populations that migrate, more than half of all deaths occur during migration. The main "predator" of sandhills is the power line. There is actually a hunting season for the lesser sandhill out west. I have heard them called "flying ribeyes".
Taken from "The Cry of the Sandhill Crane" by Steve Grooms
Thanks for a good year my friends - have a safe flight.
Drops of condensation gliding down from the center of a curved plastic surface, coalescing with other drops, growing larger and sweeping a clear path behind them...
CAT. La cigonya blanca és una espècie d'au ciconiforme de grans dimensions, pertanyent a la família Ciconiidae.
Viu en prats inundats i en planes herboses a prop de l'aigua.
Passa l'hivern a l'Àfrica i al mes de febrer comencen a arribar a Europa, se les pot veure fins a la tardor.
El seu plomatge és majoritàriament blanc amb negre a les ales, mentre que els adults adquireixen un color vermell a les potes i el bec.
Aquesta au ha donat origen a moltes llegendes i històries al llarg de la seva àrea de distribució, de les quals la més coneguda és la història que els nadons són portats per elles.
ENG. The white stork is a species of large-scale ciconiforme bird, belonging to the Ciconiidae family.
He lives in flooded meadows and grassy plains near water.
They spend the winter in Africa and in February they begin to reach Europe, they can be seen until autumn.
Its plumage is mostly white with black on the wings, while adults acquire a red color on the legs and beaks.
This bird has given rise to many legends and stories throughout its distribution area, of which the best known is the story that babies are wearing for them.
ESP. La cigüeña blanca es una especie de ave ciconiiforme de grandes dimensiones, perteneciente a la familia Ciconiidae.
Vive en prados inundados y llanuras cubiertas de hierba cerca del agua.
El invierno en África pasa y desde el mes de febrero comienzan a llegar a Europa, se pueden ver hasta el otoño.
Su plumaje es mayormente blanco con negro en las alas, mientras que los adultos adquieren un color rojo en las patas y el pico.
Esta ave ha dado lugar a muchas leyendas e historias en toda su gama, de las cuales la más conocida es la historia de que los bebés son llevados por ellos.
Millions of migrating birds annually nest and raise young on Wrangel Island during the long daylight hours of the arctic summer.Arctic landscapes have been described as close-toned land...the tones are lighter than tones of midday sky...except for a brief few weeks in autumn, the arctic is without colour. Its land colours are the colors of deserts, the ochres and siennas of stratified earth, the grey-greens of sparse plant life on bare soil. On closer inspection, however, the monotonic rock of the polar desert is seen to harbor the myriad greens, reds, yellows and oranges of lichens. Occasionally there is brilliant coloring as with wildflowers in the summer. Arresting color in the Arctic is found more often in the huge skies with its vivid twilights.
Greater sandhill cranes migrate through both Seedskadee and Cokeville Meadows NWRs. A number of pairs will remain to nest and raise their colts. The wet meadows and riparian habitats provide abundandant food resources for them and they can be spotted in the very early mornings or late evenings of late spring and summer leading their young colts. Their ancient trumpet like calls can be heard echoing through the valleys. Photo: Tom Koerner