Doug Gimesy / Platypus (Ornithorhynchus anatinus) male, close up of mid portion of tail, taxidermied animal. Belgrave, Victoria, Australia.

Marie Read / Cinnamon teal (Anas cyanoptera), male taking flight from water, Orange County, California, USA, April.

Tony Heald / South Georgia pintail (Anas georgica georgica) swimming in front of Southern elephant seal (Mirounga leonina), male. Gold Harbour, South Georgia. October.

Tony Heald / South Georgia pintail (Anas georgica georgica) pair, one preening. Gold Harbour, South Georgia. October.

Mary McDonald / South georgia pintail (Anas georgica georgica) Godthul, South Georgia, South Atlantic

Mike Potts / Southern bull kelp (Durvillaea sp) home to the Aukland Island Teal (Anas aucklandica) Enderby Island. Auckland Islands. Subantarctic New Zealand.

Mike Potts / South Georgia pintail (Anas georgica) feeding in a stream. Grytviken Harbour, South Georgia.

Mike Potts / South Georgia pintail (Anas georgica) feeding in a stream, metal and wood in background from old whaling station. Grytviken Harbour. South Georgia.

Pal Hermansen / Common eider ducklings (Somateria mollissima) sleeping at nest with mother sleeping nearby, Husavik, Iceland Winner of the Portfolio Award of the Terre Sauvage Nature Images Awards Competition 2017.

Bernard Castelein / Yellow-billed teal (Anas georgica) at Laguna Hedionda, between Polques and Quetena, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) on shore of Laguna Hedionda, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) Laguna Hedionda, Altiplano, Bolivia