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