Carol Walker / Wild pinto Mustang mare and foal running in Sand Wash Basin, Colorado, USA.

David Pattyn / Zanzibar red colobus monkey (Procolobus kirkii) crossing the main road through the Reserve, Jozani forest, Jozani Chwaka Bay NP, Zanzibar, Tanzania, August.

Melvin Grey / Violet-tailed sylph hummingbird (Aglaiocercus coelestis) hummingbird adult male, approaching flower to feed, Tandayapa, Ecuador

Sven Zacek / Otter (Lutra lutra) running through snow, Southern Estonia, January.

Pete Oxford / Woman with basket on her head picking tea (Camellia sinensis), Assam, North East India, October 2014.

Sven Zacek / White-tailed sea eagle (Haliaeetus albicilla) flying, and hunting over sea, Norway, July.

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) in flight, Japan, February

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

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

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

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

David Pattyn / Black necked grebe (Podiceps nigricollis) adult bird diving for food while foraging. The Netherlands.April 2014

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.

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

Nick Garbutt / Golden-crowned Sifaka (Propithecus tattersalli) leaping through forest canopy. Forests adjacent to the village of Andranotsimaty, near Daraina, northern Madagascar. Critically endangered species.

Angelo Gandolfi / Toco Toucan (Ramphastos toco) beak open with tongue visible while feeding on mango, Brazil

Jussi Murtosaari / Great Grey Owl (Strix nebulosa) diving for prey, southern Finland, April.

Eric Medard / Ibex (Capra ibex) males fighting, Jura, Switzerland, captive

Ingo Arndt / Red wood ant (Formica rufa) carrying construction material to anthill (fir needles), Germany.

Kim Taylor / Redpoll (Carduelis flammea) male landing on Alder (Alnus glutinosa) Surrey, England. February

Jabruson / Young Chimpanzee in fruiting fig tree (Pan troglodytes schweinfurthii) Tongo, Virunga National Park, Kivu, Democratic Republic of Congo

Jack Dykinga / Sandhill crane (Grus canadensis) landing in icy pond filled with snow geese (Chen caerulescens) Bosque del Apache, New Mexico. January 2013

Markus Varesvuo,Markus Varesvuo / Guillemot (Uria aalge) landing, Vardo, Norway, March.

Andrew Parkinson / Gannet (Morus bassanus) adult, backlit by the morning sun, coming in to land in colony, Shetland Islands, Scotland, UK. September

David Tipling / Great Skua (Stercorarius skua) in flight low over water, Fetlar, Shetland, June

Axel Gomille,Axel Gomille / Indian Flying Fox (Pteropus giganteus), flying, India

Andy Rouse,Andy Rouse / Barn Owl (Tyto alba) in hovering hunting flight. UK, February.

Sven Zacek,Sven Zacek / Great Tit (Parus major) in flight. Southern Estonia, December.

Jean E. Roche / Aerial view of old basins used for concentrating magnesium sulphate (MgSO4) in the salt pans at Salin de Giraud, Camargue, Southern France

Brent Stephenson / Wilson's Storm-petrel (Oceanites oceanicus) hovering whilst feeding in calm conditions. Cuverville Island, Antarctic Peninsula, Antarctica, December.

Chadden Hunter / Filming on the Antarctic sea-ice at the edge of a small hole. A cameraman gets a shock when a Killer whale (Orcinus orca) mother and calf explode out of the water in front of his face. Taken on locat...

Ernie Janes / Greylag Goose (Anser anser) landing on water. Norfolk, UK, Europe, April.

Ernie Janes / Greylag Goose (Anser anser) landing on water. Norfolk, UK, Europe, April.

Orsolya Haarberg / Eurasian beaver (Castor fiber) swimming, Telemark, Norway, June

Graham Eaton / Coot (Fulica atra) dancing on ice, Wirral, England, UK, January.

Jerry Monkman / Two young brothers ice fishing on the West River in Brattleboro, Vermont, USA, February 2007. Model released.

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jurgen Freund / Fred Gurgel organizing his algae / seaweed specimens, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Rolf Nussbaumer / RF- Sword-billed Hummingbird (Ensifera ensifera) female feeding from Passion flower (Passiflora mixta). Papallacta, Ecuador, Andes, South America. January. (This image may be licensed either as rights...

Anup Shah / Tigress concentrating on prey {Panthera tigris tigris} Ranthambhore NP, Rajasthan India. Noorjahan

SCOTLAND: The Big Picture / Boy exploring woodland during forest kindergarten session. Aberdeen, Aberdeenshire, Scotland, UK. Editorial use only

Suzi Eszterhas / Children, supporters of Martinez Beavers, making beaver crafts. Martinez, California. September 2015. Model released.