Sven Zacek / Brown bear (Ursus arctos) in coniferous forest. Ida-Virumaa, Eastern Estonia. September.

Jack Dykinga / Aurora Borealis display above conifers and Polar Lake. Near Great Slave Lake, Northwest Territories, Canada. September 2018.

Philippe Clement / Two Lynx (Lynx lynx) kittens play fighting in front of den entrance, Bavarian Forest National Park, Germany, October. Captive.

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

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

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Walter Soestbergen/ BIA / Bohemian Waxwing (Bombycilla garrulus), Amstelveen, Netherlands

Nick Saunders/ BIA / Boreal Owl (Aegolius funereus) chicks, Saskatchewan, Canada

Terry Whittaker / Slow motion close-up of a large group of Fulmars (Fulmarus glacialis) feeding from a fish processing plant outfall, Grundafjordur, Iceland, March.

Philippe Clement / Lynx (Lynx lynx) feeding on a Roe deer (Capreolus capreolus) in snow in winter, with juvenile passing by, Bavarian Forest National Park, Germany, January. Captive.

Francisco Marquez / Pair of Iberian lynxes (Lynx pardinus) greeting, Andalusia, Spain, January.