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The American black duck (Anas rubripes) is a large dabbling duck in the family Anatidae.It was described by William Brewster in 1902. It is the heaviest species in the genus Anas, weighing 720–1,640 g (1.59–3.62 lb) on average and measuring 54–59 cm (21–23 in) in length with an 88–95 cm (35–37 in) wingspan.
Wood. With big fluffy plumes on the tops of their heads, Wood ducks are distinct among many other breeds. But what really sets these birds apart is the unique profile of the female duck, which ...
This is a list of the breeds of domestic duck which have official recognition at national or international level. [1]Most breeds of duck derive from the wild mallard, Anas platyrhynchos, while a small minority are descendants of the Muscovy duck, Cairina moschata.
The first evidence for parental selection of exaggerated, ornamental traits in offspring was found in American coots. [38] Black American coot chicks have conspicuously orange-tipped ornamental plumes covering the front half of their body that are known as "chick ornaments" that eventually get bleached out after six days. This brightly colored ...
The retention of ancestral genetic variation can be caused by incomplete lineage sorting (ILS) and introgression after secondary contact. These two factors can cause genetic variation to be shared between closely related species which is possibly why an American black duck or a Mottled duck (Anas fulvigula) may have notable white on its speculum or a Mexican duck may have flecks of green.
The American coot has been observed rarely in Britain and Ireland, while the Eurasian coot is found across Asia, Australia and parts of Africa. In southern Louisiana, the coot is referred to by the French name "poule d'eau", which translates into English as "water hen".
American wigeon: Mareca americana (Gmelin, JF, 1789) 92 Amsterdam wigeon: Mareca marecula (Olson & Jouventin, 1996) (E) 93 African black duck: Anas sparsa Eyton, 1838: 94 Yellow-billed duck: Anas undulata Dubois, CF, 1838: 95 Meller's duck: Anas melleri Sclater, PL, 1865: 96 Pacific black duck: Anas superciliosa Gmelin, JF, 1789: 97 Laysan duck ...
Aug. 18—MEMPHIS, Tenn. — Continental breeding duck populations are down 7% from 2022, Ducks Unlimited said Friday, Aug. 18, in reporting results from the annual spring North American waterfowl ...