Jordi Chias / Wandering albatross (Diomedea exulans) flying on the open ocean, Drake passage, Antarctic Peninsula, Antarctica.

Marie Read / Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October.

Russell Cooper / Mandarin duck drake (Aix galericulata) on the water, showing orange 'sail' feathers which are used when displaying, Southwest London, UK, March.

Russell Cooper / Mandarin duck drake (Aix galericulata) from behind flapping its wings. Southwest London, UK. February.

Donald M. Jones / Mallard (Anas platyrhynchos) drake flying, Montana

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

Donald M. Jones / Wood Duck (Aix sponsa) drake flying, central Montana

Donald M. Jones / Wood Duck (Aix sponsa) drake stretching wings, central Montana

Donald M. Jones / Northern Pintail (Anas acuta) drake flying, central Montana

Donald M. Jones / Mallard (Anas platyrhynchos) drake flying, central Montana

Donald M. Jones / American Wigeon (Anas americana) drake, western Montana

Ross Hoddinott / Mallard duck (Anas platyrhynchos) drake swimming through reflection of house, Bude canal, Cornwall, UK. April 2015.