John Waters / Close-up of a Coot (Fulica atra) walking on ice, Greylake RSPB Reserve, Somerset Levels, England, UK, February.

Frederique Olivier / Adelie penguins (Pygoscelis adeliae) swimming underneath sea ice, Antarctica.

Frederique Olivier / Close-up of a group of Emperor penguin (Aptenodytes forsteri) chicks huddled together in a blizzard, covered in snow, Adelie Land, Antarctica, January.

Andy Rouse / Iceberg and mountain, Svalbard, Norway. Arctic. July.

Bence Mate / Great egret (Ardea alba) and Grey heron (Ardea cinerea) fighting over a fish, Lake Csaj, Kiskunsagi National Park, Hungary

John Waters / Panning shot of Brambles (Rubus fruticosus) covered in frost, Catcott, Somerset Levels, England, UK, January.

Frederique Olivier / Close-up of a Weddell seal (Leptonychotes weddellii) haulded out and looking at camera, scratches back on ice, Adelie Land, Antarctica, January.

Frederique Olivier / Juvenile Weddell seal (Leptonychotes weddellii) scratching, Adelie Land, Antarctica, January.

Frederique Olivier / Close-up of a juvenile Weddell seal (Leptonychotes weddellii) yawning, Adelie Land, Antarctica, January.

Frederique Olivier / Close-up of an Emperor penguin (Aptenodytes forsteri) resting on snow, Adelie Land, Antarctica, January.

Frederique Olivier / Close-up of an Emperor penguin (Aptenodytes forsteri) tobogganing, Adelie Land, Antarctica, January.

Frederique Olivier / Close-up of an Emperor penguin (Aptenodytes forsteri) calling for chick, Adelie Land, Antarctica, January.