Mark Hamblin / 2020VISION / Red deer (Cervus elaphus) stag in blizzard, moving head and blinking, Cairngorms NP, Scotland, December 2011

Alex Hyde / Sheep sheltering from harsh weather behind a stone wall, Peak District National Park, Derbyshire, UK. March.

Chadden Hunter / King penguin (Aptenodytes patagonicus) chick creche enduring harsh weather, South Georgia. Taken on location for BBC Frozen Planet series, 2008

Peter Cairns / 2020VISION / Silhouette of herd of female Red deer (Cervus elaphus) on ridge at dawn, RSPB Forsinard Flows, Flow country, Caithness, Highland, Scotland, UK, June 2011. Did you know? Red deer are essentially forest...

Juan Carlos Munoz / Huge flock of Bramblings (Fringilla montifringilla) flying to roost in trees, Gorbeia Natural Park, Basque country, Spain, January 2011, unusual winter visitors pushed further south than usual by the...

Juan Carlos Munoz / Huge flock of Bramblings (Fringilla montifringilla) in flight, Gorbeia Natural Park, Basque country, Spain, January 2011, unusual winter visitors pushed further south than usual by the harsh winter co...

Ross Hoddinott / Robin (Erithacus rubecula) resting on trowel handle in a garden, Nr Bradworthy, Devon, England, UK. January

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) dead chick and unhatched egg on ice, unable to survive harsh winter conditions. Atka Bay, Antarctica. September.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) unhatched egg, unable to survive harsh winter conditions. Atka Bay, Antarctica. September.

Ashley Cooper / Bus on the Dunmail Raise in a blizzard, Lake District, England, UK. December 2010

Ashley Cooper / Snow plough on Dunmail Raise, Lake District, England, UK. December 2010

Ingo Arndt / Mountains in harsh winter conditions, Spitsbergen, Svalbard, Norway, April