Maxime Aliaga / Keepers holding hands of infant Sumatran orangutan (Pongo abelii) as they walk to 'forest school' ,Quarantine centre of SOCP (Sumatran Orangutan Conservation Program) near Medan, North Sumatra

Franco Banfi / Atlantic spotted dolphins, (Stenella frontalis), Formigas Islet dive site, Santa Maria Island, Azores, Portugal, Atlantic Ocean

Cyril Ruoso / Red-necked wallaby (Macropus rufogriseus) in woodland clearing. Population naturalised after escaping from an animal park. Rambouillet forest, Ile-de-France, France. October 2019.

Will Burrard-Lucas / Male melanistic leopard (Panthera pardus) at night, under a starry sky. Laikipia Wilderness Camp, Kenya. Photographed with a camera trap. EDITORIAL USE ONLY. All other uses require clearance.

Will Burrard-Lucas / A mating pair of leopards (Panthera pardus) caught in front of a camera trap at night, Laikipia Wilderness Camp, Kenya. Photographed with a camera trap. EDITORIAL USE ONLY. All other uses require clea...

Andy Murch / Cape fur seal (Arctocephalus pusillus) playing with Dark shyshark (Haploblepharus pictus) carcass, seal diving in background. False Bay, South Africa. May.

Stephen Dalton / Brown rat (Rattus norvegicus) leaping from dustbin, Sussex, England.

Shane Gross / Dugong (Dugong dugon) feeding on Tapegrass (Halophila stipulacea), accompanied by juvenile Golden trevally fish (Gnathanodon speciosus). Marsa Alam, Egypt.

Shane Gross / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) shoal swimming over Turtlegrass (Halophila stipulacea) seagrass bed. Marsa Alam, Egypt.

Hermann Brehm / Lion (Panthera leo), females interacting, with cub, Masai Mara, Kenya

Doug Gimesy / Ringtail possum (Pseudocheirus peregrinus) licks water droplets from a train station bench at night. Gardenvale train station, Gardenvale, Victoria, Australia. September.

Mark MacEwen / Southern elephant seal (Mirounga leonina), two females sleeping. St Andrews Bay, South Georgia. October.

Ben Hall / Red deer (Cervus elaphus) backlit at dawn with visible breath. UK. October.

Ben Hall / Langur monkey (Semnopithecus) climbing tree in misty forest at dawn, India, November.

Mateusz Piesiak / Eurasian wolf (Canis lupus lupus) pack in snow, forest in Bialowieza National Park. Poland. January 2019. Received Honour award at the Mont Photo 2020 Competition.

Bence Mate / Wild dog (Lycaon pictus) two pups playing in dust, Mkuze, South Africa. August. Highly commended in the Mammals category of the GDT European Wildlife Photographer of the Year Competition 2020.

Danny Green / European river otter (Lutra lutra) in mist reflected in water at night. Lincolnshire, UK, September.

Pal Hermansen / Walrus (Odobenus rosmarus) head, close-up. Svalbard, Norway. September.

Pal Hermansen / Beaver (Castor fiber) portrait. Trondelag, Norway. May.

Pal Hermansen / Bearded seal (Erignathus barbatus) hauled out on ice, reflected in water. Svalbard, Norway. May.

Pal Hermansen / Brown bear (Ursus arctos) silhouetted in forest at night. Finland. August.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) walking on drifting sea ice. Svalbard, Norway.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) on drifting ice floe. Svalbard, Norway.

Neil Aldridge / A lesser horseshoe bat (Rhinolophus hipposideros) flying over grassland habitat at night. Devon, UK.

Sergey Gorshkov / Siberian tiger (Panthera tigris altaica) at night, taken with remote camera in Land of the Leopard National Park, Far East Russia, November.Highly Commended in the Animal Portraits Category of the Wil...

Tony Heald / Red Deer (Cervus elaphus) stags fighting during the rutting season. Bushy Park, London, UK. October.

Jen Guyton / A Eurasian beaver (Castor fiber) chews on a stem just outside of its lodge in a pond in the Elbe River Bioshere Reserve, northern Germany.

Ben Hall / Mountain hare (Lepus timidus) on snow covered moorland at last light, Derbyshire, UK.

Sergey Gorshkov / Siberian tiger (Panthera tigris altaica) female territorial marking by rubbing cheek against ancient Manchurian fir tree, Land of the Leopard National Park, Far East Russia, November. Taken with remo...

Jenny E. Ross / Polar bear (Ursus maritimus) cubs, age 2-3 months, in den, Wapusk National Park, Manitoba, Canada. March.

Suzi Eszterhas / Leopard (Panthera pardus) mother and cub age four months , Jao Reserve, Okavango, Botswana

Pal Hermansen / Red squirrel (Sciurus vulgaris) in tree with conifer cone in mouth. Akershus, Norway. April.

Pal Hermansen / Wild reindeer (Rangifer tarandus) male silhouetted at dawn. Forollhogna National Park, Innlandet, Norway.

Jussi Murtosaari / Brown bear (Ursus arctos) cub climbing tree. Martinselkonen, Kainuu, Finland. May.

Nick Garbutt / Walrus (Odobenus rosmarus) amongst group hauled out on shore. Spitsbergen, Svalbard, Norway. July.

Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male sitting in tree, portrait. Hokkaido, Japan. March

Wayne Wu Ying / Wild Wonders of China / Indo-Pacific humpback dolphin (Sousa chinensis) Tai O, western side of Lantau Island, Hong Kong, China

Philippe Clement / Three Hudson Bay wolf pups (Canis lupus hudsonicus) playing near den, Bavarian Wildlife Forest Park, Germany, June. Captive, native to Canada.

Andy Rouse / Roe deer (Capreolus capreolus) amongst dandelion seed heads at sunset, UK. May.

Andy Rouse / RF - Roe deer (Capreolus capreolus) feeding on dandelion seed heads at sunset, UK. May. UK. (This image may be licensed either as rights managed or royalty free.)

Anup Shah / African elephant (Loxodonta africana) babies playing . Masai Mara National Reserve, Kenya. July 2017.

Anup Shah / Lion (Panthera leo) males walking together . Masai Mara National Reserve, Kenya.

Mark Carwardine / Fin whale (Balaenoptera physalus), two feeding, aerial view. Baja California, Mexico. March.

Franco Banfi / Tail of Blue whale diving (Balaenoptera musculus brevicauda) possibly the pygmy sub-species of blue whale, (Balaenoptera musculus). Mirissa, Sri Lanka, Indian Ocean. Photo taken under permit

Franco Banfi / Tail of Blue whale (Balaenoptera musculus brevicauda). This may be the pygmy sub-species of blue whale, Balaenoptera musculus. Mirissa, Sri Lanka, Indian Ocean

John Cancalosi / Captive corn snake (Pantherophis guttatus) eating an Eastern chipmunk (Eutamias sp.). The chipmunk was found dead and fed to the captive snake. North America.

Simon Littlejohn / Two European otters (Lutra lutra) hunting in the River Stour, Dorset, England, UK, May.

Simon Littlejohn / Female Patagonian puma (Puma concolor patagonia) feeding on a Guanaco (Lama guanacoe) carcass, Torres del Paine National Park, Patagonia, Chile, July.