Tim Fitzharris / Redhead Duck (Aythya americana) male, Moses Lake, Washington

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

Claudio Contreras / Redhead goby (Elacatinus punticulatus), Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

Claudio Contreras / Redhead Goby (Elacatinus punticulatus), Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

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.

Nick Upton / Redhead (Aythya americana) swimming, captive, UK, April.

Nick Upton / Redhead (Aythya americana) female swimming, captive, UK, April.

Steve Gettle / Redhead Duck (Aythya americana) female and male, North Dakota

Alan Murphy / Redhead Duck (Aythya americana) male in courtship display, British Columbia, Canada

Alan Murphy / Redhead Duck (Aythya americana) male, British Columbia, Canada

Franco Banfi / Redhead goby (Elacatinus puncticulatus) Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

MYN / Andrew Snyder / Brazilian redhead tarantula (Maraca cabocla) Surama, Guyana. Meetyourneighbours.net project

MYN / Andrew Snyder / Brazilian redhead (Maraca cabocla / horrida) Surama, Guyana. Meetyourneighbours.net project

Robert Royse / Redhead Duck (Aythya americana) male, Ohio

Marie Read / Redhead ducks (Aytha americana) with a few Ring-necked ducks (Aytha collaris) mixed in, swimming in a large raft, Cayuga Lake, New York, USA, January

Marie Read / Redhead ducks (Aytha americana) with a few Ring-necked ducks (Aytha collaris) mixed in, large raft, Cayuga Lake, New York, USA, January

Gerrit Vyn / Redhead (Aythya americana) adult female on water, Okanogan County, Washington, USA April

Gerrit Vyn / Redhead head (Aythya americana) adult male on water, Okanogan County, Washington, USA April

Rod Williams / Male Redhead Duck (Aythya americana) on water. Captive. Endemic to southern USA. UK, April.

Steve Gettle / Redhead Duck (Aythya americana) female with males in breeding plumage, Saginaw Bay, Michigan

Steve Gettle / Redhead Duck (Aythya americana) male in breeding plumage, J. Clark Salyer National Wildlife Refuge, North Dakota

Donald M. Jones / Redhead Duck (Aythya americana) three males and one female flying, eastern Montana

Rolf Nussbaumer / Male Redhead (Aythya americana) resting in water, Rockport, Texas, USA. December 2003

Rod Williams / Redhead duck {Aythya americana} male, captive, from North America

Tim Fitzharris / Redhead Duck (Aythya americana) male, portrait, North America

Tim Fitzharris / Redhead Duck (Aythya americana) male with reflection near reeds, Washington

Suzi Eszterhas / Redhead Duck (Aythya americana) pair, Sacramento, California

Tim Fitzharris / Redhead Duck (Aythya americana) male with reflection near reeds, Washington

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

Joel Sartore / Photo Ark / Redhead goby (Elacatinus puncticulatus) portrait, Indianapolis Zoo. Captive, occurs in Eastern Pacific Ocean.

Joel Sartore / Photo Ark / Redhead goby (Elacatinus puncticulatus) portrait, Indianapolis Zoo. Captive, occurs in Eastern Pacific Ocean.

Claudio Contreras / Redhead goby (Elacatinus punticulatus), San Rafaelito Lighthouse Islet, Balandra National Protected Area, near La Paz, Gulf of California (Sea of Cortez), Mexico, September

Claudio Contreras / Redhead goby (Elacatinus punticulatus), Puerto Escondido, Loreto Bay National Park, Gulf of California (Sea of Cortez), Mexico, August

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