Marion Vollborn/ BIA / Whooper Swan (Cygnus cygnus) group taking flight on snow, Hokkaido, Japan

Tim Fitzharris / Trumpeter Swan (Cygnus buccinator) flock flying, Arkansas

Donald M. Jones / Trumpeter Swan (Cygnus buccinator) trio flying, southern Alaska

Michel Roggo / Chub fish (Leuciscus cephalus) and Mute swan (Cygnus color) swimming over, Rhine river, Schaffhausen, Switzerland. RUNNER-UP - Wildlife Photographer of the Year 2010.

Michael Quinton / Trumpeter Swan (Cygnus buccinator) pair on lake at sunset, North America

Flip de Nooyer / Mute Swan (Cygnus olor) three cygnets on parent's back, Europe

Flip de Nooyer / Mute Swan (Cygnus olor) pair courting, Europe

Konrad Wothe / Whooper Swan (Cygnus cygnus) pair arguing at wintering site, Kussharo-ko, Hokkaido, Japan

Konrad Wothe / Mute Swan (Cygnus olor) with three chicks riding on her back, Germany

Konrad Wothe / Mute Swan (Cygnus olor) courting pair, Germany

Jim Brandenburg / Tundra Swan (Cygnus columbianus) trio flying against cloudy sky, Minnesota

Michael Quinton / Trumpeter Swan (Cygnus buccinator) pair on lake, Copper River Delta, Alaska