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Aythya Ferina France
''Aythya'' is a genus of diving ducks, with twelve species currently accepted. The genus was described in 1822 by the German zoologist Friedrich Boie, with the type species being greater scaup. The name ''Aythya'' comes from the Ancient Greek word (), which referred to an unknown diving-bird. The species are plump, compact, medium-sized ducks ranging from 37–61 cm long, 60–84 cm wingspan, and weighing 410–1600 g, with canvasback the largest, and ring-necked duck and ferruginous duck marginally the smallest. The body plumage is variably white, grey, red-brown, or black, often with a finely vermiculation, vermiculated pattern; in several species, the flanks are white or pale grey, the back darker grey to black, and the breast and tail black. The heads are strongly coloured in the males, orange-red in some species, and black with a green to purple sheen (structural coloration, structural colour) in good light; the sheen colour varies with both species and angle of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greater Scaup
The greater scaup (''Aythya marila''), just scaup in Europe or, colloquially, "bluebill" in North America, is a mid-sized diving duck, larger than the closely related lesser scaup and tufted duck. It spends the summer months breeding in Iceland, east across Scandinavia, northern Russia and Siberia, Alaska, and northern Canada. During the winter, it bird migration, migrates south to the coasts of Europe, eastern Asia, and North America. Duck, Drake greater scaup are larger and have more rounded heads than the females; they have a bright blue bill and yellow eyes. Their heads are dark, with a green to purple (depending on light angle) gloss; the breast is black, the belly white, the upperparts pale grey, and the wing shows a strong white stripe. The females are mostly brown, again with white on the wing. They have dull blue bills and a white patch on the face. Greater scaup nest near water, typically on islands in northern lakes or on floating mats of vegetation. They begin breed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dan Zetterström
Dan Zetterström (born 1 June 1954) is a Swedish ornithologist and bird artist. He is best known as a co-author of the Collins Bird Guide, with Killian Mullarney, Lars Svensson and Peter J. Grant. He has designed several series of Swedish stamps. He has contributed to the following titles: * ''Collins Bird Guide'', with Killian Mullarney, Lars Svensson and Peter Grant * ''Handbook of Bird Identification'', Mark Beaman and Steve Madge * ''Country Life Guides, Birds of Britain and Europe'', Håkan Delin et al. * ''Handbook of the Birds of Europe The Middle East and North Africa'' ('' Birds of the Western Palearctic''), S. Cramp et al. References 1954 births 20th-century Swedish illustrators 21st-century Swedish illustrators Living people Swedish bird artists Swedish ornithologists {{Illustrator-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ring-necked Duck
The ring-necked duck (''Aythya collaris'') is a diving duck from North America commonly found in freshwater ponds and lakes. The scientific name is derived from Greek , an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ''collaris'', "of the neck" from ''collum'', "neck". Description Ring-necked ducks are small to medium-sized diving ducks with the following length, weight, and wingspan measurements: * Length: 15.3–18.1 in (39–46 cm) * Weight: 17.3–32.1 oz (490–910 g) * Wingspan: 24.4–24.8 in (62–63 cm) The adult male is similar in color pattern to the Eurasian tufted duck, its relative. Males are a little bit bigger than the female. It has two white rings surrounding its gray bill, a shiny black angular head, black back, white line on the wings, a white breast and yellow eyes. The adult female has a grayish brown angular head and body with a dark brown back, a dark bill with a more subtle light band than the mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redhead (bird)
The redhead (''Aythya americana'') is a medium-sized diving duck. The scientific name is derived from Greek ''aithuia'', an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ''americana'', of America. The redhead is long with an wingspan; the weight ranges from , with males weighing an average of and females an average of . It belongs to the genus ''Aythya'', together with 11 other described species. The redhead and the common pochard form a sister group which together is sister to the canvasback. This waterfowl is easily distinguished from most other ducks by the male's copper colored head and pale blue bill during the breeding season; from its close relative canvasback it is distinguished by the more rounded head, shorter bill, and (in the males) yellow, not red, eye. The Eurasian common pochard is even more similar, but very rarely overlaps in range; it also differs in having a red eye, and a more acute, less rounded head shape. Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redhead Female RWD2
Red hair, also known as ginger hair, is a human hair color found in 2–6% of people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein. Red hair varies in hue from a deep burgundy or bright copper, or auburn, to burnt orange or red-orange to strawberry blond. Characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin, it is typically associated with fair skin color, lighter eye color, freckles, and sensitivity to ultraviolet light. Cultural reactions to red hair have been varied. The term "redhead" has been in use since at least 1510, while the term "ginger" is sometimes used, especially in Britain and Ireland, to describe a person with red hair. The origin of red hair can be traced to Central Asia, caused by a mutation in the MC1R gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Pochard
The common pochard (; ''Aythya ferina''), known simply as pochard in the United Kingdom, is a medium-sized diving duck in the family Anatidae. It is widespread across the Palearctic. It breeds primarily in the steppe regions of Scandinavia and Siberia, and winters further south and west. Taxonomy and systematics Swedish taxonomist Carl Linnaeus first assigned a scientific name to the common pochard in the tenth edition of his landmark treatise Systema Naturae; this was the first edition which included such names. He called the duck ''Anas ferina''. In 1822, German zoologist Friedrich Boie created the genus '' Aythya'' for various diving ducks, and moved the common pochard to that new genus. Uptake of ''Aythya'' as the genus for the common pochard was mixed for much of the next century, with some authors leaving the duck in the genus ''Anas'' or assigning it to various other now-defunct genera instead. The common pochard is considered a superspecies with the canvasback. In the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aythya Ferina France
''Aythya'' is a genus of diving ducks, with twelve species currently accepted. The genus was described in 1822 by the German zoologist Friedrich Boie, with the type species being greater scaup. The name ''Aythya'' comes from the Ancient Greek word (), which referred to an unknown diving-bird. The species are plump, compact, medium-sized ducks ranging from 37–61 cm long, 60–84 cm wingspan, and weighing 410–1600 g, with canvasback the largest, and ring-necked duck and ferruginous duck marginally the smallest. The body plumage is variably white, grey, red-brown, or black, often with a finely vermiculation, vermiculated pattern; in several species, the flanks are white or pale grey, the back darker grey to black, and the breast and tail black. The heads are strongly coloured in the males, orange-red in some species, and black with a green to purple sheen (structural coloration, structural colour) in good light; the sheen colour varies with both species and angle of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canvasback
The canvasback (''Aythya valisineria'') is a species of diving duck, the largest found in North America. Taxonomy Scottish-American naturalist Alexander Wilson described the canvasback in 1814. The genus name is derived from Greek ''aithuia'', an unidentified seabird mentioned by authors, including Hesychius and Aristotle. The species name ''valisineria'' comes from the wild celery '' Vallisneria americana'', whose winter buds and rhizomes are the canvasback's preferred food during the nonbreeding period. The celery genus is itself named for seventeenth century Italian botanist Antonio Vallisneri. The duck's common name is based on early European inhabitants of North America's assertion that its back was a canvas-like color. In other languages it is just a ''white-backed duck''; for example in French, ''morillon à dos blanc'', or Spanish, ''pato lomo blanco''. In Mexico it is called ''pato coacoxtle''. Description It ranges from in length and weighs , with a wingspan of . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
