George Sanker / Lesser Scaup (Aythya affinis) female walking across ice. Yellowstone National Park, Wyoming, USA, June.

Donald M. Jones / Lesser Scaup (Aythya affinis) drake landing, Fairfield, Montana

Rolf Nussbaumer / Lesser scaup duck (Athya affinis) male sleeping on water, Dinero, Lake Corpus Christi, South Texas, USA

Gerrit Vyn / Lesser scaup duck (Aythya affinis) female profile on water, King County, Washington, USA April

Gerrit Vyn / Lesser scaup duck (Aythya affinis) male profile on water, King County, Washington, USA April

David Kjaer / Lesser Scaup (Aythya affinis) first winter female on water. Gloucestershire, UK, January.

LYNN M. STONE / Lesser Scaup Duck (Aythya affinis) male on water, captive, North America

Michael Quinton / Lesser Scaup (Aythya affinis) drake in breeding plumage, Alaska

Michael Quinton / Lesser Scaup (Aythya affinis) drake in breeding plumage, Alaska

Michael Quinton / Lesser Scaup (Aythya affinis) female, Alaska

Michael Quinton / Lesser Scaup (Aythya affinis) drake in breeding plumage, Alaska

Sebastian Kennerknecht / Lesser Scaup (Aythya affinis) on pond, Baylands Nature Preserve, Bay Area, California

Donald M. Jones / Lesser Scaup (Aythya affinis) male taking off from pond, western Montana

Donald M. Jones / Lesser Scaup (Aythya affinis) male landing in pond, western Montana

Donald M. Jones / Lesser Scaup (Aythya affinis) male, western Montana

Donald M. Jones / Lesser Scaup (Aythya affinis) female, Montana

Tom Vezo / Lesser Scaup (Aythya affinis) male, North America

Tom Vezo / Lesser Scaup (Aythya affinis) flock on lake, North America

Rolf Nussbaumer / Male Lesser Scaup (Athya affinis) New Braunfels, Texas, USA. March 2001

Doug Wechsler / Lesser Scaup {Aythya affinis} female on water, New Jersey, USA

Donald M. Jones / Lesser Scaup (Aythya affinis) drake preening, Fairfield, Montana

Tom Vezo / Lesser Scaup (Aythya affinis) flock taking off from lake, North America

Tim Fitzharris / Lesser Scaup (Aythya affinis) male landing on lake, North America