Kirkendall-Spring / Hiker crossing Newton Creek, Elk Meadows Trail, Mount Hood Wilderness. Oregon, USA, July 2014. Model released.

Steven Kazlowski / Polar bear (Ursus maritimus) young bear rolling around in the snow, on newly formed pack ice during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Tui De Roy / White-vented storm petrel (Oceanites gracilis galapagoensis) 'walking' on surface of water whilst foraging, Galapagos

George Sanker / Golden-mantled ground squirrel (Callospermophilus lateralis) feeding on flowers, Yellowstone National Park, Wyoming, USA, June.

Fiona Rogers / Tana mangabey (Cercocebus galeritus) female grooming a juvenile. Tana River Forest, South eastern Kenya.

Hanne & Jens Eriksen / Black guillemot (Cepphus grylle) taking off, Denmark, May

Markus Varesvuo / White-tailed Eagle (Haliaeetus albicilla) landing on snowy rock, Norway, November

Denis-Huot / Two male Thomson's gazelles (Eudorcas thomsonii) fighting, Masai-Mara game reserve, Kenya.

Ben Cranke / Black-striped capuchin (Sapajus libidinosus) using rock as a tool to break open palm nut Parnaiba Headwaters National Park, Piaui, Brazil. July.

Ben Cranke / Black-striped capuchin (Sapajus libidinosus) using rock as a tool to break open palm nut, Parnaiba Headwaters National Park, Piaui, Brazil. July.

Markus Varesvuo / Great Grey Owl (Strix nebulosa) hunting, Tornio, Finland, March

Sergey Gorshkov / Musk ox (Ovibos moschatus) portrait, Wrangel Island, Far Eastern Russia, March.