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 A
Drake Greater scaup Barnegat Inlet, New Jersey, USA
A tufted duck in flight showing the white wingbar
A tufted duck × common pochard hybrid. Note the casual resemblance to a lesser scaup in head shape, but distinguishable by the more uniform (less vermiculated) mantle feathers, and the bill pattern with a pale band and large black tip (uniform bluish in lesser scaup).
Canvasback (Aythya valisineria)
The redhead is a medium-sized diving duck. Its scientific name is derived from Greek aithuia, an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin americana, of Am
Aythya
…Conservation status A. valisineria Canvasback North America least concern A. ferina Common pochard Northern Europe into Asia vulnerable A. americana Redhead North America, from northern Canada to the lower United States least concern A. collaris Ring-necked duck North America, from Alaska and northern Canada…
Redhead Aythya americana, Oakley Street, Cambridge, Maryland
A Readhead Hen Swimming with her Babies
Neck-stretching courtship ritual of the adult male redhead depicted in Audubon's Birds of America in 1843