Michio Hoshino / Polar Bear (Ursus maritimus) pair on snowfield, Churchill, Manitoba, Canada

Michael Quinton / Caribou (Rangifer tarandus) mother and calf crossing snow field, Alaska

David Woodfall / Ptarmigan (Lagopus mutus) male in snowfield, Cairngorms, Scotland, UK, February.

David Woodfall / Ptarmigan (Lagopus mutus) female in snowfield, Cairngorms National Park, Scotland, England, UK, February.

Igor Shpilenok / Creek under a snowfield, Volcanoes of Kamchatka UNESCO World Heritage Site, Russia, September 2014.

Tim Laman / Tourists hiking up snowfield at Neko Harbor, Andvord Bay, Antarctica, February 2011.

Tim Laman / Tourists hiking up snowfield at Neko Harbor, Andvord Bay, Antarctica, February 2011.

Peter Cairns / Coyote (Canis latrans) walking across snowfield, Yellowstone National Park, Wyoming, USA.

Axel Gebauer / Water pipit (Anthus spinoletta) on a snowfield, Abago, Kavkazsky Zapovednik, Russia, July.

Sergey Gorshkov / Common Eider (Somateria mollissima) group of males and females on snow field, Wrangel Island, Russia

Andy Rouse / Aerial view of the Murray Snowfield looking south towards the Neumayer Glacier, South Georgia, Antarctica, December 2006

Gerry Ellis / Adelie Penguin (Pygoscelis adeliae) pair on snowfield, Antarctic Peninsula, Antarctica

Konrad Wothe / Polar Bear (Ursus maritimus) adult portrait, Churchill, Manitoba, Canada

Thomas Mangelsen / Polar Bear (Ursus maritimus) adult walking towards camera on ice field, Churchill, Manitoba, Canada

Konrad Wothe / Polar Bear (Ursus maritimus) mother with two cubs, Churchill, Manitoba, Canada

Michio Hoshino / Polar Bear (Ursus maritimus) pair on snowfield, Churchill, Manitoba, Canada

Jim Brandenburg / Peary Caribou (Rangifer tarandus pearyi) running across snow field, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Fox (Alopex lagopus) on snow field, Ellesmere Island, Nunavut, Canada

Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams crossing snowfield in spring, Glacier National Park, Montana

Sumio Harada / Mountain Goat (Oreamnos americanus) kid on snowfield with runoff in background, Glacier National Park, Montana

Yva Momatiuk & John Eastcott / Snow fields and cumulus clouds near Fortuna Bay, South Georgia Island

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) group on snowfield, South Georgia Island

Sumio Harada / Mountain Goat (Oreamnos americanus) pair resting in snow field with glacier in background, Yoho National Park, Rocky Mountains, Canada

Jim Brandenburg / Snowfield and icebergs, Ellesmere Island, Nunavut, Canada

Charlie Summers / Grey wolf (Canis lupus) standing alert in snowfield, Lamar Valley, Yellowstone National Park,Wyoming, USA. January.

SCOTLAND: The Big Picture / Mountain hare (Lepus timidus) running on a mountain snowfield, Tomatin, Highlands, Scotland, UK. March.