Marie Read / Snow buntings (Plectrophenax nivalis) flock in flight during a snowstorm, New York, USA, January.

Jeff Foott / Mountains and river after autumn snowfall, Sunwapta River, Jasper National Park, Alberta, Canada

Jeff Foott / Mixed coniferous and deciduous forest after snowfall in autumn, Wells Gray Provincial Park, British Columbia, Canada

Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada

Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada

Andrew Peacock / Minden / Taiga and snow-covered mountains in autumn, Glacier Bay National Park, Alaska

Sylvain Cordier / Polar bear (Ursus maritimus), female with two cubs, on a barrier island outside Kaktovik, Alaska, USA.

Andrew Peacock / Taiga and coastal snow-covered mountains in autumn, Glacier Bay National Park, Alaska

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) hunting in snow fall, Alaska

Donald M. Jones / Willow Ptarmigan (Lagopus lagopus) trio in fall, transitioning to winter plummage, central Alaska

Andrew Parkinson / Brown hare (Lepus europaeus) three adults in snow covered field during a snow fall, Derbyshire, UK, February.

Floris van Breugel / Autumnal landscape with snow, Arrigetch Peaks region of Brooks Range, Gates of the Arctic National Park, Alaska, USA, August 2014.