- Aythya, genus Aythya - canvasback; redhead; pochard; etc.
--1 is a kind of bird genus
--1 is a member of Anatidae, family Anatidae
--1 has members:canvasback, canvasback duck, Aythya valisineria; pochard, Aythya ferina; redhead, Aythya americana; scaup, scaup duck, bluebill, broadbill