|
Hybridisation In Terns
Hybridisation in terns is not as frequent as in gulls; however, some mixed pairings have been noted. Marsh terns Hybridisation between white-winged black tern and black tern has been recorded from Sweden and the Netherlands. Two juvenile birds at Chew Valley Lake, England, in September 1978 and September 1981, were also believed to be hybrids; they showed mixed characteristics of the two species, specifically a combination of a dark mantle (a feature of white-winged black) with dark patches on the breast-side (a feature of black tern, not shown by white-winged black).Davis, A. H. (1982) Tern showing mixed characters of Black and White-winged Black Tern '' British Birds'' 75(12): 579-80 See also * Hybridisation in gulls Hybridisation in gulls occurs quite frequently, although to varying degrees depending on the species involved. Hybrid large white-headed gulls * Herring gulls and lesser black-backed gulls interbreed to a limited degree where their ranges overlap, ... Reference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-winged Black Tern
The white-winged tern, or white-winged black tern (''Chlidonias leucopterus'' or ''Chlidonias leucoptera''), is a species of tern in the family Laridae. It is a small species generally found in or near bodies of fresh water across much of the world, including Europe, Africa, Asia, and Australia. The genus name is from Ancient Greek ''khelidonios'', "swallow-like", from ''khelidon'', "swallow". The name 'white-winged tern' is the standard in most English-speaking countries; in the United Kingdom, this name is also the one used by the formal ornithological recording authorities, but the older alternative 'white-winged black tern' is still frequent in popular use. Description Adult birds in summer have short red legs and a short black bill (small and stubby, measuring 22–25 mm from the feathers, decidedly shorter than the head), a black neck (often with a pale gray back) and belly, very dark grey back, with a white rump and light grey (almost white) tail, which often looks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Tern
The black tern (''Chlidonias niger'') is a small tern generally found in or near inland water in Europe, Western Asia and North America. As its name suggests, it has predominantly dark plumage. In some lights it can appear blue in the breeding season, hence the old English name "blue darr". The genus name is from Ancient Greek ''khelidonios'', "swallow-like", from ''khelidon'', "swallow": another old English name for the black tern is "carr (i.e. lake) swallow". The species name is from Latin ''niger'' "shining black". Description Adults are long, with a wingspan , and weigh . They have short dark legs and a short, weak-looking black bill, measuring , nearly as long as the head. The bill is long, slender, and looks slightly decurved. They have a dark grey back, with a white forewing, black head, neck (occasionally suffused with grey in the adult) and belly, black or blackish-brown cap (which unites in color with the ear coverts, forming an almost complete hood), and a light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Birding
''Dutch Birding'', originally subtitled ''Journal of the Dutch Birding Association'', and currently subtitled ''International journal on Palaearctic birds'', is an ornithological magazine published by the Amsterdam-based Dutch Birding Association. It was established in 1979 and its editor-in-chief is Arnoud van den Berg. The magazine has English and Dutch language editions and covers morphology, systematics, occurrence, and distribution of birds in the Benelux, Europe, and elsewhere in the Palaearctic region. It also publishes contributions on birds in the Asian-Pacific region and other regions. See also *'' Ardea'' – official publication of the Netherlands Ornithologists' Union *List of birds of the Netherlands *List of journals and magazines relating to birding and ornithology The following is a list of journals and magazines relating to birding and ornithology. The continent and country columns give the location where the journal or magazine is published and may not corr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chew Valley Lake
Chew Valley Lake () is a reservoir in Chew Stoke, Chew Valley, Somerset, England. It is the fifth-largest artificial lake in the United Kingdom, with an area of . The lake, created in the early 1950s, was opened by Queen Elizabeth II in 1956. It provides much of the drinking water for the city of Bristol and surrounding area, taking its supply from the Mendip Hills. Some of the lake water is used to maintain the flow in the River Chew. Before the lake was created, archaeological investigations were carried out that showed evidence of occupation since Neolithic times and included Roman artefacts. The lake is an important site for wildlife and has been designated a Site of Special Scientific Interest (SSSI) and a Special Protection Area (SPA). It is a national centre for birdwatching, with over 260 species recorded. The lake has indigenous and migrant water birds throughout the year, and two nature trails have been created. The flora and fauna provide habitats for some less comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, and includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Paleolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century and has had a significant cultural and legal impact on the wider world since the Age of Discovery, which began during the 15th century. The English language, the Anglican Church, and Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinicombe, Keith
Keith E. Vinicombe is a British ornithologist and writer on bird identification. Vinicombe is best known for his first book, the '' Macmillan Field Guide to Bird Identification''. Subsequent publications include ''Rare Birds in Britain and Ireland - a photographic record'', co-authored with David Cottridge, in which Vinicombe set out to explain theories about bird vagrancy in Britain and western Europe, including reverse migration. He is identification consultant to '' Birdwatch'' magazine, and has written extensively on bird identification in ''Birdwatch'', and other British journals, including ''Birding World'' and '' British Birds''. He has served on both the British Birds Rarities Committee and the British Ornithologists' Union Records Committee. His regular birding patch is Chew Valley Lake, where he has found numerous rare birds. Elsewhere in Avon, he is responsible for finding nine county firsts. Elsewhere in Britain, his finds include Britain's second ring-billed gull ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Birds (magazine)
''British Birds'' is a monthly ornithology magazine that was established in 1907. It is now published by BB 2000 Ltd, which is wholly owned by The British Birds Charitable Trust (registered charity number 1089422), established for the benefit of British ornithology. Its circulation in 2000 was 5,250 copies; its circulation peaked at 11,000 in the late 1980s. The current editor is Stephen Menzie. ''British Birds'' is aimed at serious birdwatchers and ornithologists, rather than the more casual birdwatchers catered for by some other magazines on the subject. It publishes the findings of the British Birds Rarities Committee. Its mascot, and later logo, the red grouse, was chosen because at the time it was thought to be an endemic British species (although it is now considered a subspecies of the willow grouse). In 1916, ''British Birds'' magazine absorbed ''The Zoologist'', due to the latter's shortage of subscribers. Editors The current editor of ''British Birds'' is Stephen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybridisation In Gulls
Hybridisation in gulls occurs quite frequently, although to varying degrees depending on the species involved. Hybrid large white-headed gulls * Herring gulls and lesser black-backed gulls interbreed to a limited degree where their ranges overlap, producing birds of intermediate appearance, which could be confused with yellow-legged gull. In North America, this combination is often known as "Appledore gull". * Western gulls and glaucous-winged gulls hybridise extensively in western North America between Washington and Oregon. This particular hybrid is sometimes known as the "Olympic gull", or "Puget Sound gull". The persistence and backcrossing of hybrids is believed to be due to hybrid superiority, where hybrids exhibit higher evolutionary fitness than parent species in the hybrid zone. * Great black-backed gulls and herring gulls have hybridized in eastern North America, particularly the Great Lakes. This hybrid is sometimes known as "Great Lakes gull". * Herring gulls and glauco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terns
Terns are seabirds in the family Laridae that have a worldwide distribution and are normally found near the sea, rivers, or wetlands. Terns are treated as a subgroup of the family Laridae which includes gulls and skimmers and consists of eleven genera. They are slender, lightly built birds with long, forked tails, narrow wings, long bills, and relatively short legs. Most species are pale grey above and white below, with a contrasting black cap to the head, but the marsh terns, the Inca tern, and some noddies have dark plumage for at least part of the year. The sexes are identical in appearance, but young birds are readily distinguishable from adults. Terns have a non-breeding plumage, which usually involves a white forehead and much-reduced black cap. Terns are long-lived birds and are relatively free from natural predators and parasites; most species are declining in numbers due directly or indirectly to human activities, including habitat loss, pollution, disturbance, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
