Peter Cairns / 2020VISION / Red deer (Cervus elaphus) stag in pine forest in snow blizzard, Alvie Estate, Cairngorms NP, Highlands, Scotland, UK, March. Photographer quote: "At times I couldn't see this red deer stag such was th...

Roy Mangersnes / Two Cape / Pintado Petrels (Daption capense) in flight over Point Wild on Elephant Island, Southern Ocean, November.

Jeff Vanuga / Bison herd grazing in spring with Grand Teton mountains in background, Grand Teton National Park, Wyoming, USA, April 2009

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover as altitude drops to a frozen snow covered lake in the distance, Riisitunturi National Park, Finland, February 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover as altitude drops to a frozen snow covered lake in the distance, Riisitunturi National Park, Finland, February 2009

Jack Dykinga / Bryce Canyon National Park after winter snow storms caused heavy frost and snow to cover conifer trees. Bryce Canyon National Park, Utah, USA, January.

Nick Garbutt / Wild snow leopard (Panthera uncia) bursting from cover. Ladakh Range, Western Himalayas, Ladakh, India.

Guy Edwardes / Aerial view of Julian Alps with cloud cover, Slovenia, January 2014.

Ashley Cooper / Funicular railway, at Cairngorm Ski resort in Scotland UK. March 2009

Ashley Cooper / Member of the Scottish Avalanche Information Service looks at snow crystals to help assess avalanche risk on Cairngorm in the Cairngorm National Park, Scotland, UK. March 2009

Ashley Cooper / Member of the Scottish Avalanche Information Service looks at snow crystals to help assess avalanche risk on Cairngorm in the Cairngorm National Park, Scotland, UK. March 2009

Ashley Cooper / Member of the Scottish Avalanche Information Service demonstrates how to assess avalanche risk on Cairngorm in the Cairngorm National Park in Scotland UK. February 2009

Ashley Cooper / Equipent used by the Scottish Avalanche Information Service to assess avalanche risk in the Scottish mountains, Cairngorms National Park, UK. February 2009

Ashley Cooper / Snowy weather in Ambleside during the December 2010 big chill, Lake District, England, UK. December 2010

Ashley Cooper / Derwent Water completely frozen over with cycle tracks, Keswick, Lake District, England, UK, December 2010.

Ashley Cooper / Derwent Water completely frozen over with cycle tracks, Keswick, Lake District, England, UK, December 2010.

Ashley Cooper / Derwent Water at Keswick in the Lake District completely frozen over during the December 2010 big chill, with footsteps from a walker who walked across the lake. December 2010

Ashley Cooper / Scandale Pass below Red Screes in the Lake District, England, UK. January 2012

Ashley Cooper / The Aiguillette des Posettes with Bilberry plants colouring up in late summer, above Chamonix, French Alps, and the rapidly retreating Glacier du tour. France, September 2014.

Ashley Cooper / The Aiguillette des Posettes with Bilberry plants colouring up in late summer, above Chamonix, French Alps, and the rapidly retreating Glacier du tour. September 2014.

Ashley Cooper / Rapidly retreating Brouillard glacier, and Freney Glacier, on the slopes of Mont Blanc du Courmayeur, the newly exposed rock clearly reveals the area the glacier used to cover. IAlps, Italy, August.

Michel Roggo / Lac de Fenetre, alpine lake, still under an ice cover at the end of May, 2456 m above sea level, Canton of Valais, Switzerland. May 2012. Photographed for The Freshwater Project

Michel Roggo / Lac de Fenetre, alpine lake, still under an ice cover at the end of May, 2456 m above sea level, Canton of Valais, Switzerland. May 2012. Photographed for The Freshwater Project

Michel Roggo / Lac de Fenetre, alpine lake, still under an ice cover at the end of May, 2456 m above sea level, Canton of Valais, Switzerland. May 2012. Photographed for The Freshwater Project

Michel Roggo / Lac de Fenetre, alpine lake, still under an ice cover at the end of May, 2456 m above sea level, Canton of Valais, Switzerland. May 2013. Photographed for The Freshwater Project

Terry Whittaker / Aerial view of Mountains showing through cloud cover, Westfjords, Iceland. April

Pal Hermansen / Svalbard ptarmigan (Lagopus mutus hyperborea) male stretching note the feather-cover on the feet. Svalbard, Norway, September.

Floris van Breugel / American Bison (Bison bison) covered in snow, Lamar Valley, Yellowstone National Park, Wyoming, USA. December.

Michel Roggo / Lac de Fenetre alpine lake, still under ice cover at the end of May, 2456 m above sea level, Canton of Valais, Switzerland, May. Taken for the Freshwater Project.

Bryan and Cherry Alexander / Chukchi reindeer herders putting cover on Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, 2010. 40 BELOW bookplate.

Bryan and Cherry Alexander / Chukchi reindeer herders putting cover on Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, 2010. 40 BELOW bookplate.

Bryan and Cherry Alexander / Chukchi reindeer herders preparing to put cover on Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, 2010. 40 BELOW bookplate.

Bryan and Cherry Alexander / Chukchi reindeer herders putting cover on their Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Chukchi reindeer herders putting cover on their Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Chukchi reindeer herders preparing cover of their Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Chukchi reindeer herders putting cover on their Yaranga (traditional tent). Chukotskiy Peninsula, Chukotka, Siberia, Russia, spring 2010

David Tipling / European brown hare {Lepus europaeus} crouched on game cover strip on edge of winter wheat field in snow, Norfolk, UK, January

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover on trees as altitude drops, Riisitunturi National Park, Finland, February 2009

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover as altitude drops to a frozen snow covered lake in the distance, at sunrise, Riisitunturi National Park, Finland, February 2009

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover on trees as altitude drops to a frozen snow covered lake in the distance, at sunset, Riisitunturi National Park, Finland, February 2009

Wild Wonders of Europe / Zacek / View over snow covered trees, with decreasing snow cover on trees as altitude drops to a frozen snow covered lake in the distance, at sunset, Riisitunturi National Park, Finland, February 2009

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Jerry Monkman / Low cloud cover and early snow on the boreal forest on Mt. Lafayette, Eagle Lake and the Franconia Ridge, White Mountains, New Hampshire, USA

Jean E. Roche / Beehives under cover above woodpile in winter, Queyras regional nature park, Alps, France

Nigel Cattlin / Light snow dusting on flowering large flowered white and purple Crocuses 'Pickwick' in winter, Berkshire, March

Mark Taylor / The New Road, Albury, with snow cover, Surrey, England, Feb 2009

Jussi Murtosaari / Boreal common frog (Rana temporaria) dying in the snow, having been awoken from hibernation by a warm spell in the morning. It was unable to find cover night and lay dying on a frozen lake, with the a...

Orsolya Haarberg / Snow-covered mountain landscape illuminated by sunlight through shifting cloud cover with strong wind whipping up snow on mountain slopes, Dovrefjell-Sunndalsfjella National Park, Norway. February, 20...

Laurent Geslin / Red fox (Vulpes vulpes) head portrait in snow, Jura, Switzerland (Book cover image)