Yukihiro Fukuda / Feral domestic rabbit (Oryctolagus cuniculus) standing on hind legs on coast, Okunojima Island, also known as Rabbit Island, Hiroshima, Japan.

Mark Bowler / Aerial view of Amazon rainforest with river, Peru

Nick Upton / Julia Coats of the Animal and Plant Health Agency releasing Eurasian beaver (Castor fiber) back into River Otter. Part of escaped population re-released to the wild following veterinary check ups. Tak...

Michel Roggo / Iceberg in the sea outside the Kangia Ilulissat Icefjord. Iceberg from the Sermeg Kujalleg Glacier, UNESCO World Heritage Site, Kalaallit Nunaat, Greenland, August 2014. Photographed for The Freshwate...

Markus Varesvuo / Willow grouse (Lagopus lagopus) Kiilopaa, Inari, Finland, January.

Ann & Steve Toon / Rothschild's giraffes (Giraffa camelopardalis rothschildi), feeding on leaves, Woburn Safari Park, UK, June, captive.

Andy Rouse / Grizzly bear (Ursus arctos horribilis) charging through river chasing salmon, Alaska, USA. Crop of 01500299.

Andy Rouse / Gentoo penguin (Pygoscelis papua) jumping onto beach, Carcass Island, Falkland Islands.

Ole Jorgen Liodden / Walrus (Odobenus rosmarus) underwater view, Edgeoya, Svalbard, Norway, June.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) behind Polar bear (Ursus maritimus), Svalbard, Norway, July.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) pouncing, Svalbard, Norway, July.

Ole Jorgen Liodden / Arctic tern (Sterna Paradisaea) flying, Svalbard, Norway, July.