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The Hook Bill is a light duck, with an average weight of approximately 2 kg. [6]: 417 Three colour variants are recognised in France, the Netherlands and the United Kingdom: [8] the dusky mallard has a black head and rump with green lustre, the body in shades of grey with no white neck-ring, and a slate-grey beak; the white-bibbed dusky mallard is similarly coloured, but with a distinct white ...
The eastern spot-billed duck was described by the English biologist Robert Swinhoe in 1866 under its current binomial name Anas zonorhyncha. [2] [3] The name of the genus Anas is the Latin word for a duck. The specific epithet zonorhyncha is derived from the classical Greek words zōnē meaning "band" or "girdle" and rhunkhos meaning "bill". [4]
The Indian spot-billed duck was described by the naturalist Johann Reinhold Forster in 1781 under its current binomial name Anas poecilorhyncha. [2] [3] The name of the genus Anas is the Latin word for a duck. The specific epithet poecilorhyncha combines the classical Greek words poikilos meaning "pied" or "spotted" and rhunkhos meaning a "bill ...
The chicks are covered with a black down. On the body the down has yellow hair-like tips. On the sides of the head, nape and throat the hair-like tips are longer and orange-red. Between the eyes and on the lores, the tips are red. The shield is bright red and the bill is red with a white tip. [17]
When in flight, the mostly dark plumage noticeably contrasts with the white primaries and secondaries. [9] [2] The legs and feet are yellow to orange. [2] On the other hand, females are dull and brown. [9] The bill is bluish-gray with a black tip and the legs are yellow-orange to gray. [9] [2] The contrasting white crissum is the most ...
Ducklings have a white face with a pattern similar to that of the adult female in black and a dark gray eye patch. Their black crown extends in a V-shape from the base of the bill to the back of the neck. The rump and flanks are white, the back and tail black. Neck, breast and belly are light-gray to white the wings are black.
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The specific epithet albellus is a Latin diminutive of albus meaning "white". [8] The term smew has been used since the 17th century and is of uncertain origin. It is believed to be related to the Dutch smient ("wigeon") and the German Schmeiente or Schmünte, "wild duck." [9] It is probably derived from smee, a dialectal term for a wild duck ...