Danny Green / Hazel Dormouse (Muscardinus avellanarius) hibernating amongst leaves and acorns. Captive. Leicestershire, UK, October.

Danny Green / Arctic fox (Vulpes lagopus) carrying Ringed seal (Pusa hispida) pup prey in mouth. Svalbard, Norway, April.

Danny Green / Arctic fox (Vulpes lagopus) blue morph, portrait in snow. Hornstrandir Nature Reserve, Iceland, March.

Danny Green / Arctic fox (Vulpes lagopus) cubs playing. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) cub resting. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) cub in meadow, portrait. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) cub in meadow, portrait. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) walking in heavy snow. Hornstrandir Nature Reserve, Iceland. February.

Danny Green / Arctic fox (Vulpes lagopus) resting in snow. Hornstrandir Nature Reserve, Iceland, February.

Danny Green / Arctic fox (Vulpes lagopus) standing in snow besides Ringed seal (Pusa hispida) pup prey. Svalbard, Norway, April.

Danny Green / North American river otter (Lontra canadensis) on back, rolling on snow bank. Yellowstone National Park, USA, January.

Danny Green / North American river otter (Lontra canadensis) female and cub walking across snow, reflected in water. Yellowstone National Park, USA, January.

Danny Green / North American river otter (Lontra canadensis) on snow covered bank, reflected in icy water. Yellowstone National Park, USA, January.

Danny Green / Wolf (Canis lupus) standing at woodland edge. Finland, April.

Danny Green / Bengal tiger (Panthera tigris tigris) female, portrait. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) profile walking, looking for prey. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) resting on track. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) male resting in undergrowth, portrait. Bandhavgarh National Park, India, December.

Danny Green / Kermode bear (Ursus americanus kermodei) standing on roots at water's edge, hunting for fish. British Columbia, Canada, September.

Danny Green / Kermode bear (Ursus americanus kermodei) hunting for Salmon in stream. British Columbia, Canada, September.

Danny Green / Sea otter (Enhydra lutris) female and pup playing. Alaska, USA, February.

Danny Green / Sea otter (Enhydra lutris) female and pup. Alaska, USA, February.

Danny Green / European river otter (Lutra lutra) reflected in water at night. Lincolnshire, England, UK. July.

Danny Green / Coyote (Canis latrans) standing in snow, dwarfed by frosty trees. Yellowstone National Park, USA, January.

Danny Green / Bison (Bison bison) in snow, at woodland edge with frost covered trees. Yellowstone National Park, USA, January 2020.

Danny Green / Big horn sheep (Ovis canadensis) male looking down from snowy ledge, portrait. Yellowstone National Park, USA, January.

Danny Green / Bald eagle (Haliaeetus leucocephalus), two perched on rocks in front of frozen waterfall. Alaska, USA, February.

Danny Green / Starling murmuration, hundreds of thousands of starlings (Sturnus vulgaris) gather in the skies near their night time roost. Gretna Green, Scotland, January. Black and White Category Winner, Wildlife...

Danny Green / Willow Tit (Poecile montanus) on a snowy branch. Utsjoki, Finland, February.

Danny Green / Whooper Swans (Cygnus cygnus) in snow. Japan, February.

Danny Green / Waxwings (Bombycilla garrulus), in snow. Finland, March

Danny Green / Roe Deer (Capreolus capreolus) in snow. Flatanger, Norway, January.

Danny Green / Red Deer Stags (Cervus elaphus) fighting amongst the bracken. Bradgate Park, Leicestershire, UK, October.

Danny Green / Red Deer Stag (Cervus elaphus) roaring. Bradgate Park, Leicestershire, UK, October.

Danny Green / Mountain hare (Lepus timidus) resting Cairngorms, Scotland, March

Danny Green / European Brown Bear (Ursus arctos) reflected in forest pond in evening mist, Finland, June

Danny Green / Brown Bear (Ursus arctos) in the forest, Finland, June

Danny Green / Common cranes (Grus grus) leaving the roost at dawn, Hula Valley, Northern Israel, January

Danny Green / Arctic fox (Alopex lagopus) following scent, in winter pelage. Svalbard, Norway. April.

Danny Green / Arctic fox (Alopex lagopus) camouflaged in winter pelage. Svalbard, Norway, April.

Danny Green / Arctic fox (Alopex lagopus) in snow. Svalbard, Norway. April.

Danny Green / Arctic fox (Alopex lagopus) standing in tundra. Svalbard, Norway, July.

Danny Green / Ringed seal (Pusa hispida) resting on ice, reflected in water. Svalbard, Norway. July.

Danny Green / Ringed seal (Pusa hispida) and pup resting on ice. Svalbard, Norway. April.

Danny Green / Reindeer (Rangifer tarandus), two standing on ridge in blizzard. Svalbard, Norway. April.

Danny Green / Reindeer (Rangifer tarandus), two play fighting in snow. Svalbard, Norway, April.

Danny Green / Reindeer (Rangifer tarandus), two standing on ridge in snow. Svalbard, Norway, April.

Danny Green / Reindeer (Rangifer tarandus) standing on ridge in snow, another reindeer in background. Svalbard, Norway, April.