Thomas Hinsche/ BIA / Common Goldeneye (Bucephala clangula) male flapping, Saxony-Anhalt, Germany

Jussi Murtosaari / Goldeneye (Bucephala clangula) with chicks swimming behind, Helsinki, Uusimaa, Finland, May.

Sebastian Kennerknecht / Common Goldeneye (Bucephala clangula) male in breeding plumage on pond, Santa Cruz, Monterey Bay, California

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

E.J. Peiker/ BIA / Common Goldeneye (Bucephala clangula) male, Arizona

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 / Female Goldeneye (Bucephala clangula) on lake, Sweden, April.

Eric Medard / Female Goldeneye (Bucephala clangula) on lake, Sweden, April.

Eric Medard / Male Goldeneye (Bucephala clangula) stretching wings, Sweden, May.

Eric Medard / Pair of Goldeneyess (Bucephala clangula) gmating, Sweden, May.

Eric Medard / Pair of Goldeneyes (Bucephala clangula) displaying, Sweden, May.