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

David Pattyn / European red fox (Vulpes vulpes crucigera) in deep snow, with just eyes and ears visible above snow. Gran Paradiso National Park, Italy. December

Erlend Haarberg / Norway lemming (Lemmus lemmus) jumping aggressively, during the lemming population explosion, Vauldalen, Norway, May, 2011.

Danny Green / Atlantic Puffin (Fratercula arctica) flock resting on a snow bank, Hornya, Varanger, Norway, April

Markus Varesvuo / Red-crowned Cranes (Grus japonensis) displaying and calling in snow, Hokkaido, Japan, February

Erlend Haarberg / Mountain hare (Lepus timidus) backlit in snow, Vauldalen, Norway, May.

Erlend Haarberg / Red fox (Vulpes vulpes) in snow, Varanger Peninsula, Norway.

Ole Jorgen Liodden / Herd of Moose (Alces alces) following in line in each other's tracks, aerial view, Valdres, Norway, February.

Wild Wonders of Europe / E Haarb / Chamois (Rupicapra rupicapra) in alpine landscape in snow, Gran Paradiso National Park, Italy, November 2008. Exclusive Japanese calendar rights for 2014

Markus Varesvuo / Rock ptarmigan (Lagopus mutus) male flying over snow in winter plumage, Utsjoki, Finland, April 2005

Edwin Giesbers / Mute swan (Cygnus olor) flock on snow, Hazerswoude, The Netherlands, February.

Wim van den Heever / Whooper swans (Cygnus cygnus) early evening in a snow storm, Lake Kussharo, Hokkaido, Japan. Taken with remote camera.

Edwin Giesbers / Female Giant panda (Ailuropoda melanoleuca) walking on snow, approximately 10 years, captive

Matthew Maran / European robin (Erithacus rubecula) Hampstead Heath, London, England, UK. January.

Alex Hyde / Red deer herd (Cervus elaphus) moving over mountain ridge in heavy snow. Cairngorms National Park, Scotland. January.

LYNN M. STONE / West Highland Terrier in snow, Vernon, Connecticut, USA

David Pattyn / Alpine ibex (Capra ibex) male in deep snow with icicles behind, Gran Paradiso National Park, Italy. December

Edwin Giesbers / Siberian tiger {Panthera tigris altaica} looking up in snow, captive

Tui De Roy / Emperor penguin (Aptenodytes forsteri) chicks, Amanda Bay, Prydz Bay, Ingrid Christensen Coast, East Antarctica, November.

Roy Mangersnes / Arctic fox (Alopex lagopus) curled up in winter coat, Spitsbergen, Svalbard, Norway, April.

Danny Green / Japanese Macaque (Macaca fuscata) carrying young on back through snow, Nagano, Japan, February

Edwin Giesbers / Siberian tiger (Panthera tigris altaica) running in snow, captive

Danny Green / Japanese cranes (Grus japonensis) displaying in snow, Hokkaido, Japan, February

Danny Green / Mountain Hare (Lepus timidus) resting with ears back, Scotland, March. Highly Commended in the Animal Portrait Category of the BWPA Competition 2015.

Edwin Giesbers / Two Siberian tigers (Panthera tigris altaica) play-fighting in the snow, captive

Danny Green / Red deer (Cervus elaphus) stag in the snow, Scotland, March

Markus Varesvuo / Great Grey Owl (Strix nebulosa) flying low over snow covered ground, Tornio, Finland, March. Magic Moments book plate.

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

Danny Green / Whooper swans (Cygnus cygnus) two in flight, during snowfall, Lake Kussharo, Japan, February

Uri Golman / Portrait of an Arctic snow hare (Lepus arcticus groenlandicus) North East Greenland. March

George Sanker / White-tailed deer (Odocoileus virginianus) females grazing in snow, Acadia National Park, Maine, USA. February.

Fabrice Cahez / Wild cat (Felis sylvestris) in snow, Vosges, France, February.

Mark Hamblin / Mountain hare (Lepus timidus) running across wind swept snow field, near Carrbridge, Cairngorms National Park, Scotland, January 2010. Highly commended in the Habitat category of the BWPA competition...

Radomir Jakubowski / Red fox (Vulpes vulpes) standing in snowfall, Grand Teton National Park, Wyoming, USA, February. Winner of the NPL Best Single Image award in the Terre Sauvage Nature Images Awards competition 2015.

Markus Varesvuo / Female Willow grouse / Ptarmigan (Lagopus lagopus) looking out from behind snow, Inari Kiilopaa, Finland, January.

Wim van den Heever / Whooper swans (Cygnus cygnus) group of three, camouflaged on frozen lake, Kussharo, Hokkaido Japan.

Andrew Parkinson / Mountain hare in winter coat peers from behind snow drift {Lepus timidus} Scotland, UK

Peter Cairns / Eurasian lynx (Lynx lynx) portrait in snow, captive. Norway. March.

Morten Hilmer / Two Arctic hares (Lepus arcticus) fighting, Northeast Greenland National Park, Greenland. Veolia Environnement Wildlife Photographer of the Year 2009: Runner-up in the 'Mammal Behaviour' category

Pal Hermansen / Crested tit (Parus cristatus) died during cold winter night, Akershus Norway

LYNN M. STONE / American Bald Eagles (Haliaeetus leucocephalus) perched in snow Alaska

Danny Green / Red Fox (Vulpes vulpes) asleep in the snow, Churchill, Cananda, November

Bence Mate / Head portrait of Common buzzard (Buteo buteo) walking in snow, Pusztaszer, Kiskunsagi National Park, Hungary

Markus Varesvuo / Female Black grouse (Tetrao / Lyrurus tetrix) perched in tree covered in snow, Inari Kiilopaa, Finland, January.

Igor Shpilenok / Steller's sea eagle {haliaeetus pelagicus} flying through heavy snow storm, Kuril Lake, Kamchatka, Far East Russia

Jussi Murtosaari / European Dipper (Cinclus cinclus) on ice next to stream, winter, Finland. February.

Wild Wonders of Europe / Widstrand / Golden eagle (Aquila chrysaetos) and White-tailed sea eagle (Haliaeetus albicilla) fighting over a deer carcass with a Hooded crow (Corvus corone cornix) nearby, Flatanger, Norway, November 2008

Eric Baccega / Reindeer (Rangifer tarandus) herd migrating in spring at dusk under moon. Yar-Sale district, Yamal, Northwest Siberia, Russia. April.

Wild Wonders of Europe / Munier / Muskox (Ovibos moschatus) walking through wind blowing snow, Dovrefjell National Park, Norway, February 2009 WWE BOOK

Wild Wonders of Europe / Munier / Reindeer (Rangifer tarandus) antlers, body hidden by snow, Forollhogna National Park, Norway, September 2008

Wild Wonders of Europe / Liodden / Two Svalbard reindeer (Rangifer tarandus platyrhynchus) interacting, Spitsbergen, Svalbard, March 2009

Steven Kazlowski / Adelie penguin (Pygoscelis Adeliae) in falling snow on the western Antarctic Peninsula, Southern Ocean

Pete Oxford / Emperor Penguins walking in a row, Antarctica.

Aflo / Japanese weasel {Mustela itatsi} in burrow in snow and ice. Japan

Igor Shpilenok / Stoat {Mustela erminea} in white winter coat, Kronotsky Zapovednik, Kamchatka, Far East Russia, April

Elio Della Ferrera / Stoat / Ermine running across snow in winter, Alps, Eruope

Andy Rouse / Robin (Erithacus rubecula) perched in snow, Wales, UK (non-ex) January

Markus Varesvuo / Bullfinch (Pyrhula pyrhula) on frozen branches. Kuusamo, Finland, January

Andy Rouse / Blue tit (Parus caeruleus) perched in snow, Wales, UK (non-ex) January

Wild Wonders of Europe / E Haarberg / Looking down on Chamois (Rupicapra rupicapra) walking through deep snow, Gran Paradiso National Park, Italy, November 2008

Wild Wonders of Europe / E Haarberg / Chamois (Rupicapra rupicapra) in snow, Gran Paradiso National Park, Italy, November 2008

Wild Wonders of Europe / Unterthiner / Whooper swan (Cygnus cygnus) portrait, Lake Tysslingen, Sweden, March 2009 WWE BOOK PLATE. WWE OUTDOOR EXHIBITION

Markus Varesvuo / Eurasian red squirrel (Sciurus vulgaris) portrait in snow, Kuusamo, Finland, February

Edwin Giesbers / Red squirrel (Sciurus vulgaris) sitting upright in deep snow, Austria, Europe

Peter Cairns / Red squirrel (Sciurus vulgaris) sitting on snow covered tree stump, Glenfeshie, Cairngorms NP, Scotland, February 2009

Wild Wonders of Europe / Cairns / Red squirrel (Sciurus vulgaris) in snow laden forest, Cairngorms National Park, Scotland, March 2007

Markus Varesvuo / Fieldfare (Turdus pilaris) on fruit tree in snow. Helsinki, Finland. January. Overall winner in the Swiss Ornithological Institute photography competition 2013.

Markus Varesvuo / Pine Grosbeak (Pinicola enucleator) female feeding on berries in winter, Liminka, Finland, October

Markus Varesvuo / Bohemian Waxwing (Bombycilla garrulus) male on berries, Liminka Finland October

Markus Varesvuo / Waxwings (Bombycilla garrulus) feeding on snow covered Rowan (Sorbus) berries, whilst in flight, Kuusamo, Finland, Scandinavia, January. Magic Moments book plate.

Markus Varesvuo / Black Woodpecker (Dryocopus martius) flying through snow, Posio, Finland, February 2008. Magic Moments book plate.

Markus Varesvuo / Siberian Jay (Perisoreus infaustus) flying over snow covered ground, carrying acorn in beak, Kuusamo Finland, Scandinavia, March. Magic Moments book plate.

Staffan Widstrand / European grey wolf {Canis Lupus} released into wild, Russia.

Angelo Gandolfi / Two European Grey wolves (Canis lupus) one howling, in snow, captive, Bayerisch National Park, Germany

Lynn M Stone / Arctic wolf running in snow {Canis lupus arctos} captive USA

Aflo / Two Japanese macaques (Macaca fuscata) sleeping with awake baby, in snow, Jigokudani, Nagano, Japan

Yukihiro Fukuda / Japanese macaques (Macaca fuscata) warming up by bathing in a hot spring during snowfall, only females and young bathe, Jigokudani, Joshinetsu Kogen NP, Nagano, Japan

Steven Kazlowski / Polar bear (Ursus maritimus) sow plays with her spring cub outside their den in late winter, Alaska

David Pike / Polar bear asleep with very small cub {Ursus maritimus} Canada

Staffan Widstrand / Polar bear lying on back playing with twig {Ursus maritimus} Canada Churchill,

Markus Varesvuo / Black Grouse (Tetrao tetrix) ruffling feathers, Askola, Finland, March

Cyril Ruoso / Common frog (Rana temporaria) jumping towards pond in breeding season in the Alps, France, June..

David Tipling / Black Cock / Grouse {Tetrao tetrix} fighting on lek in snow, Finland.

Markus Varesvuo / Black Grouse (Tetrao tetrix) two males fighting, Liminka, Finland, April

Steven Kazlowski / Arctic fox (Vulpes / Alopex lagopus) resting on a snow drift, early autumn, 1002 area of the Arctic National Wildlife Refuge, Arctic coast, Alaska, October 2008

Staffan Widstrand / Arctic fox portrait {Vulpes lagopus} Ellesmere Northern territory, Canada.

Fergus Gill / Male Ptarmigan (Lagopus mutus) in winter plumage, camouflaged against snow, Cairngorm National Park, Scotland, UK. HIGHLY COMMENDED: Young Awards, 15-17 Years, Wildlife Photographer of the Year 2010

Mark Hamblin / Ptarmigan (Lagopus mutus) in winter plumage, Grampian Mountains, Scotland, February 2010. Highly commended in the Habitat category of the BWPA competition 2010

Igor Shpilenok / Domestic cat (Felis catus) scaring away a red fox (Vulpes vulpes), Kronotsky Nature Reserve,m Kamchatka, Russia. Veolia Environnement Wildlife Photographer of the Year 2009: Urban and Garden Wildlife...

Igor Shpilenok / Red Fox (Vulpes vulpes) portrait in a snow hole, Kronotsky Zapovednik, Kamchatka, Russia

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} groups walking along snow trail after heavy snow, Jigokudani, Nagano, Japan

Markus Varesvuo / Willow grouse (Lagopus lagopus) female in snow, winter plumage, Utsjoki, Finland, April

Markus Varesvuo / Hawk Owl perched in frost (Surnia ulula) Finland

Bence Mate / Great white egret (Ardea alba) in snow, Lake Csaj, Kiskunsagi National Park, Hungary