bird genus - a genus of birds

Anatidae, family Anatidae - swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks

Aythya valisineria, canvasback, canvasback duck - North American wild duck valued for sport and food

Aythya ferina, pochard - heavy-bodied Old World diving duck having a gray-and-black body and reddish head

Aythya americana, redhead - North American diving duck with a gray-and-black body and reddish-brown head

bluebill, scaup, scaup duck, broadbill - diving ducks of North America having a bluish-gray bill