Steven Kazlowski / Polar bear (Ursus maritimus) mother with cub, newly emerged from their den on the Arctic coast, eastern Arctic National Wildlife Refuge, Alaska

Wim van den Heever / King penguins (Aptenodytes patagonicus) at sunrise. Two males and a female, with the males fighting for the attention of the female. Falklands Islands. 2018 Wildlife Photographer of the Year LUMIX Peo...

David Pattyn / Red fox (Vulpes vulpes) in deep snow emerging from den, Valsavarenche valley, Gran Paradiso national Park, Aosta Valley, Alps, Italy, December

Nick Upton / Two Red fox (Vulpes vulpes) cubs playing near the entrance to their den at dusk, Somerset, England, UK, May.

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

Wim van den Heever / King penguins (Aptenodytes patagonicus) at sunrise, Falklands. Highly honoured in the Ocean View Category of the Nature's Best Windland Smith Rice Ocean View Competition 2017

Tony Phelps / Chacma baboon (Papio ursinus) troop exiting den, DeHoop Nature Reserve, Western Cape, South Africa, June.

Wim van den Heever / African elephants (Loxodonta africana) small herd at waterhole at sunset, Etosha National Park, Namibia

Wim van den Heever / African elephant (Loxodonta africana) three big bull elephants spending the late afternoon at waterhole, Ol'Donyo Kenya.

Neil Aldridge / Black-backed Jackal (Canis mesomelas) pups waiting at their den on Mashatu Game Reserve, Tuli, Botswana.

Neil Aldridge / Spotted hyaena (Crocuta crocuta) reassuring her tiny pup at the entrance to their den, Northern Tuli Game Reserve, Botswana.

Wim van den Heever / Bottlenose dolphin (Tursiops truncatus) porpoising at surface, Port St Johns, South Africa