John Chan / Male Redhead (Aythya americana) in breeding plumage, preening, Bolsa Chica Ecological Reserve, California, USA, April.

Lynn M. Stone / Redhead duck (Aythya americana) drake, paddling on Choptank River, Chesapeake Bay Eastern Shore, Maryland, USA February.

Lynn M. Stone / Canvasback duck (Aythya valisineria) and Redhead duck (Aythya americana) hybrid, this drake has orange eyes, intermediate between red of Canvasback and yellow of Redhead and intermediate light gray co...

Charlie Summers / Redhead ducks (Aythya americana) taking off, North Park, Colorado, USA.

Ben Lascelles / Bar headed geese (Anser indicus), Ruddy Shelduck (Tadorna ferruginea) and Red-crested Pochard (Netta rufina) at sunset on the holy lake of Lake Manasarovar, Tibet. June

Lynn M. Stone / Redhead (Aythya americana) drake, on river, Maryland, USA. February.

Marie Read / Redhead / Red headed pochard duck (Aythya americana) large flock taking flight in winter, Cayuga Lake, Aurora, New York, USA.

Marie Read / Large flock / raft of Redhead (Aythya americana) duck on water, Cayuga Lake, Aurora, New York, USA

Marie Read / Large flock / raft of Redhead (Aythya americana) duck on water, with Single Scaup male (Aythya sp.) in foreground. Cayuga Lake, Aurora, New York, USA

Claudio Contreras / Redhead Duck (Aythya americana) flying, Ria Celestun Biosphere Reserve, Yucatan Peninsula, Mexico, January