Espen Bergersen / Barrow's goldeneye (Bucephala islandica) in partly frozen lake. Iceland, May.

Konrad Wothe / Goldeneye (Bucephula clangula) courtship display, Germany. April.

Markus Varesvuo / Goldeneye chick (Bucephala glangula) on water, Vaala, Finland, July.

Laurie Campbell / Goldeneye (Bucephala clangula) male bird in river Tweed Estuary, Berwick-upon-Tweed, Northumberalnd, England, February.

Eric Medard / Godleneye duck preening ( Bucephala clangula) Sweden

Jussi Murtosaari / Goldeneye (Bucephala clangula) female on water, portrait, Muurame, Finland. April.

Jussi Murtosaari / Goldeneye (Bucephala clangula) male on water, portrait, Muurame, Finland. April.

Jussi Murtosaari / Goldeneye (Bucephala clangula) male on water, portrait, Muurame, Finland. April.

Roland Seitre / Goldeneye (Bucephala clangula) male, courtship display, Oslo, Norway. April.

Neil Aldridge / Tracking shot of Goldeneye (Bucephala clangula) with two chicks swimming away from camera, Scotland, June.

Markus Varesvuo / Goldeneye (Bucephala clangula) swimming amongst ice. Uto, Finland. March.

Markus Varesvuo / Goldeneye (Bucephala clangula), two fighting above water. Vaala, Finland. April.