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

Oliver Wright / Marbled white butterfly (Melanargia galathea) photographed in early morning light. Ledston, Yorkshire, June. Focus stacked image.

Oliver Wright / Portrait of a Emerald damselfly (Lestes sponsa) Yorkshire, August. Focus stacked image.

Oliver Wright / Portrait of a Common darter (Sympetrum striolatum) Yorkshire, July. Focus stacked image.

Oliver Wright / Striped Slender Robberfly (Leptogaster cylindrica) Ledston, Yorkshire, July. Focus stacked image.

Alex Mustard / Young female Grey seal (Halichoerus grypus) beneath sunburst. Farne Islands, Northumberland, UK.

Edwin Giesbers / RF - Cockchafer beetle (Melolontha melolontha). France. May. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF - White-legged damselfly (Platycnemis pennipes) peering over Oxeye daisy (Leucanthemum vulgare) flower. The Netherlands. August. (This image may be licensed either as rights managed or royalty free...

Oscar Dewhurst / Mute swan (Cygnus olor) cygnet swimming. Richmond Park, London, UK. May

Edwin Giesbers / Three Long-eared owls (Asio otus) looking down from a tree in autumn, Wijchen, The Netherlands, December. Birds in their Habitat Category winner, Expos Photos Aves Emotion'Ailes Competition 2020.

Edwin Giesbers / Long-eared owl (Asio otus) looking down from a tree in autumn, Wijchen, The Netherlands, December. Second Prize Winner, Birds in their Environment Category, Bird Photographer of the Year (BPOTY) 2019...

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

Carol Walker / RF - Percheron horse trotting through snow. Alberta, Canada. Febraury. (This image may be licensed either as rights managed or royalty free.)

Danny Green / Arctic fox (Vulpes lagopus) blue morph, portrait in snow. Hornstrandir Nature Reserve, Iceland, March.

Danny Green / Arctic fox (Vulpes lagopus) cub in meadow, portrait. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) cub in meadow, portrait. Hornstrandir Nature Reserve, Iceland, July.

Danny Green / Arctic fox (Vulpes lagopus) walking in heavy snow. Hornstrandir Nature Reserve, Iceland. February.

Danny Green / Arctic fox (Vulpes lagopus) resting in snow. Hornstrandir Nature Reserve, Iceland, February.

Danny Green / Bengal tiger (Panthera tigris tigris) resting on track. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) male resting in undergrowth, portrait. Bandhavgarh National Park, India, December.

Danny Green / Sea otter (Enhydra lutris) female and pup playing. Alaska, USA, February.

Suzi Eszterhas / Northern muriqui monkey (Brachyteles hypoxanthus) juvenile aged one year, in tree playing with its mother's tail, RPPN Feliciano Miguel Abdala, Atlantic Forest, Brazil. June.

David Hall / Steller sea lions (Eumetopias jubatus) playing underwater, Inian Island, Alaska, USA. August.

Gabriel Rojo / Jaguar (Panthera onca) lying on tree roots, portrait. Mato Grosso, Pantanal, Brazil.

Ole Jorgen Liodden / Walruses (Odobenus rosmarus) adult and young hauled on ice. Hinlopen, Svalbard, Norway, June.

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia.

Edwin Giesbers / Close-up of an eye of a Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia.

Edwin Giesbers / Female Jaguar (Panthera onca), captive, occurs in Southern and Central America.

Edwin Giesbers / Female Jaguar (Panthera onca), captive, occurs in Southern and Central America.

Michele Westmorland / Booby (Sula nebouxii) looking at camera underwater, Galapagos Island.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) in water, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Juan Carlos Munoz / Red-legged Seriema (Cariama cristata) portrait, captive, Apenheul Park, Netherlands.

Edwin Giesbers / Wide angle close-up of two European grey wolves (Canis lupus), captive, Norway, February.

David Pattyn / Dalmatian Pelican (Pelecanus crispus) portrait, close-up of eyes, Lake Kerkini, Greece. February

Jouan & Rius / Eastern grey kangaroo (Macropus giganteus), Queensland, Australia

Theo Allofs / Asian Elephant (Elephas maximus) 4 week old calf of a female trained as a working elephant for tourism and tiger tracking, India

Willi Rolfes/ BIA / European Wolf (Canis lupus), Lower Saxony, Germany

Thomas Marent / Bonobo (Pan paniscus) staring, native to central Africa

Richard Du Toit / African Lion (Panthera leo) male in thick bush, Kruger National Park, South Africa

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) mother and two month old baby, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Proboscis Monkey (Nasalis larvatus) dominant male, Sabah, Borneo, Malaysia

Sergey Gorshkov / Leopard (Panthera pardus) snarling, Botswana

Shane Gross / Cunner (Tautogolabrus adspersus) pair in Eelgrass (Zostera marina) bed. Newfoundland, Canada. September.

Graham Eaton / Wild Welsh pony in upland. Carneddau Mountains of Snowdonia National Park, Wales, UK. December 2019.

Etienne Littlefair / Mary river turtle (Elusor macrurus), full-sized adult male walking along deep riverbed, Mary River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Mary river turtle (Elusor macrurus), adult male walking along riverbed, with algae attached to his head, Mary River, Queensland, Australia. August. Cropped.

Etienne Littlefair / Gulf snapping turtle (Elseya lavarackorum), small juvenile resting near the surface, Lawn Hill Creek (Adel's Grove), Queensland, Australia. January. NOTE: small, out of focus water extraction pump...

Etienne Littlefair / Gulf snapping turtle (Elseya lavarackorum), large adult female found active in deep water on a very hot summer night, Lawn Hill Creek, Queensland, Australia. January. Cropped.