Roland Seitre / White-headed duck (Oxyura leucocephala) female with chicks, captive native to Spain, North Africa and central Asia.

Roland Seitre / White-headed duck (Oxyura leucocephala) male, captive. Endangered species.

Roland Seitre / White-headed duck (Oxyura leucocephala) male with three females, captive. Endangered species.

Roland Seitre / White-headed duck (Oxyura leucocephala) male with two females, captive. Endangered species.

Roger Powell / Male White-headed duck (Oxyura leucocephala) captive, Washington Wildfowl and Wetlands Trust, Washington, Tyne and Wear, UK.

Juan Manuel Borrero / Illustration of threatened species of birds of Spain. Iberian Guillemot (Uria aalge ibericus), Cantabrian capercallie (Tetrao urogallus cantabricus), White backed woodpecker (Dendrocopos leucotos), Be...

Rod Williams / Male White-headed Duck (Oxyura leucocephala). Endemic Mediterranean to north-west China. Endangered. UK, March.

David Kjaer / Two White-headed ducks (Oxyura leucocephala) males on water, Captive

Alan Williams / White headed duck (Oxyura leucocephala) male, captive, Arundel WWT, Sussex, UK, March

Alan Williams / White headed duck (Oxyura leucocephala) male displaying, captive, Arundel WWT, Sussex, UK, March, Endangered

Alan Williams / White headed duck (Oxyura leucocephala) male displaying, captive, Arundel WWT, Sussex, UK, March

Alan Williams / White headed duck (Oxyura leucocephala) displaying, captive, Arundel WWT, Sussex, UK, February

Rod Williams / White-headed Duck (Oxyura leucocephala) male, captive, from SW Mediterranean to NW China, Vulnerable Species

Pete Oxford / White-headed Duck (Oxyura leucocephala) male, Slimbridge Wildfowl and Wetlands Trust, England

David Kjaer / White-headed Duck (Oxyura leucocephala) Captive UK

Simon Colmer / White-headed duck (Oxyura leucocephala) female, Captive

Jose B. Ruiz / White headed duck {Oxyura leucocephala} drake resting.

Jose B. Ruiz / Female White headed duck {Oxyura leucocephala} feeding, Spain.

Jose B. Ruiz / White headed duck {Oxyura leucocephala} drake resting.

Jose B. Ruiz / White headed duck {Oxyura leucocephala} drake, Spain.

Jose B. Ruiz / Female White headed duck {Oxyura leucocephala} Spain.

Colin Seddon / White headed duck on water {Oxyura leucocephala}

Hanne & Jens Eriksen / White headed duck {Oxyura leucocephala} Ercek Golu, Turkey

Rod Williams / White headed duck male display {Oxyura leucocephala} vulnerable

Robin Chittenden / White-headed duck (Oxyura leucocephala) Norfolk, England, UK. August. Captive.

Rod Williams / Male White-headed Duck (Oxyura leucocephala) captive, from SW Mediterranean to NW China, Vulnerable Species

Rod Williams / White headed duck, male {Oxyura leucocephala} captive

Jose B. Ruiz / White headed duck, male {Oxyura leucocephala} Alicante, Spain El Hondo

Mike Potts / White headed duck male, Danube Delta wetlands, Romania, Europe {Oxyura leucocephala}

Inaki Relanzon / White-headed duck (Oxyura leucocephala) on water in wetland, La Mancha, central Spain. April.

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) male on water, Tablas de Daimiel National Park, Spain, endangered species

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) male on water, Tablas de Daimiel National Park, Spain, endangered species

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) male on water, Tablas de Daimiel National Park, Spain, endangered species

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) male on water, Tablas de Daimiel National Park, Spain, endangered species

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) female on water, Tablas de Daimiel National Park, Spain, endangered species

Jose Luis GOMEZ de FRANCISCO / White headed duck (Oxyura leucocephala) female on water, Tablas de Daimiel National Park, Spain, endangered species

Roland Seitre / White-headed Duck (Oxyura leucocephala) drake, native to Europe, Asia, and Africa

Jussi Murtosaari / White-headed duck (Oxyura leucocephala) male reflected in water. London, England, UK. March.

Nigel Cattlin / White-headed duck (Oxyura leucocephala) male duck with white head, black crown and blue bill at Arundel Wetland Centre, July