Benjamin Barthelemy,Benjamin Barthelemy / Ibex (Capra Ibex) fighting, Aiguilles Rouges National Nature Reserve, Haute-Savoie, France, June
Neil Challis / Two juvenile Long-tailed macaques (Macaca fascicularis) play fighting in a tree during a shower, Western Thailand.
Terry Whittaker / Two Arctic fox (Vulpes lagopus) cubs playing together near den, Hornvik, Hornstrandir Nature reserve, Iceland, July.
Terry Whittaker / Arctic fox (Vulpes lagopus) cubs playing with feather, playfighting and chasing each other near den, Hornvik, Hornstrandir Nature reserve, Iceland, July.
Klein & Hubert / African elephant (Loxodonta africana) calf playing in savanna, Kenya, Africa.
Richard Hopkins / Female European otter (Lutra lutra) looking directly at camera as her male cub suckles before she turns away from him; he pesters her to feed him again. Shetland, UK, September.
Andy Murch / Cape fur seal (Arctocephalus pusillus) playing with Dark shyshark (Haploblepharus pictus) carcass, seal diving in background. False Bay, South Africa. May.
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.
Philippe Clement / Three Hudson Bay wolf pups (Canis lupus hudsonicus) playing near den, Bavarian Wildlife Forest Park, Germany, June. Captive, native to Canada.
Anup Shah / African elephant (Loxodonta africana) babies playing . Masai Mara National Reserve, Kenya. July 2017.
Simon Littlejohn / Female European otter (Lutra lutra) and two large pups playing and feeding in mid river, River Stour, Dorset, England, UK, June.
Tui De Roy / Black rhino (Diceros bicornis) and White rhino (Ceratotherium simum), being harrassed by playfighting White rhino bull, Solio Game Reserve, Laikipia, Kenya. September.
Danny Green / Sea otter (Enhydra lutris) female and pup playing. Alaska, USA, February.
Tui De Roy / Galapagos sea lions (Zalophus wollebaeki) sub adult males playing with starfish, Mosquera Islet, Galapagos.
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.
Matthew Maran / Red fox vixen (Vulpes vulpes) with four suckling cubs in an allotment, cubs start to play, London, England, UK, May.
Matthew Maran / Red fox (Vulpes vulpes) plays with a dead common garden frog (Rana temporaria) on allotment, North London, England, during coronavirus lockdown, March 2020.
Matthew Maran / Red fox cubs (Vulpes vulpes) play fighting in an allotment, London, England, UK, June.
Matthew Maran / Male Red fox (Vulpes vulpes) interacting with cub in allotment, London, England, UK, June.
Matthew Maran / Red fox vixen (Vulpes vulpes) grooming and playing with her cubs in an allotment, London, England, UK, June.
David Hall / Steller sea lions (Eumetopias jubatus), three playing underwater, Inian Island, Alaska, USA. August.
David Hall / Steller sea lions (Eumetopias jubatus) playing underwater, Inian Island, Alaska, USA. August.
Karine Aigner / Portrait of a wild female Bobcat (Lynx rufus) kitten playing, Texas, USA. September.
Andres M. Dominguez / Three juvenile Golden jackal (Canis aureus) pups running across a path, Danube Delta, Romania, July.
Danny Green / Reindeer (Rangifer tarandus), two play fighting in snow. Svalbard, Norway, April.
Danny Green / Polar bear (Ursus maritimus) female and cubs play fighting. Svalbard, Norway, March 2018.
Danny Green / Polar bear (Ursus maritimus), two cubs playing, leaping across sea ice, reflected in water. Svalbard, Norway, July.
Alex Mustard / Spinner dolphin (Stenella longirostris) pod socialising close to surface. Fury Shoal, Sataya Reef, Marsa Alam, Egypt.
Ann & Steve Toon / African elephants (Loxodonta africana) herd silhouetted at sunset. Chobe National Park, Botswana.
Ingo Arndt / Female Puma (Puma concolor) with two cubs aged around four months, Torres del Paine National Park, Patagonia, Chile, July.
Felis Images / Asiatic lion (Panthera leo persica), female and cubs in morning light, cub biting mother's leg. Gir National Park, Gujarat, India. Photo?hillip Ross/Felis Images
Staffan Widstrand / African bush elephant, (Loxodonta africana) two head to head playing, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa
Jordi Chias / Leopard seal (Hydrurga leptonyx) with mouth open, Antarctic Peninsula, Antarctica.
Terry Whittaker / RF - Two Red foxes (Vulpes vulpes) on hind legs play fighting, Netherlands. (This image may be licensed either as rights managed or royalty free.)
Suzi Eszterhas / Hyacinth Macaw (Anadorhynchus hyacinthinus) two playing whilst hanging upside down, Pantanal, Brazil
Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) swimming showing belly, Troms, Norway, January.
Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) showing belly and blowing, Troms, Norway, January.
Tony Heald / Elephant (Loxodonta africana) babies playing, Etosha National Park,Namibia.
David Gallan / Two Southern right whales (Eubalaena australis) playing in shallows, taken with drone, Tathra Beach, New South Wales, Australia, August.
Matthew Maran / Red Fox (Vulpes Vulpes) cubs play fighting
North London, England, UK, June.
Klein & Hubert / Dun foal jumping over a palomino yearling while playing. Nevada, USA.
Nick Upton / Two Red fox (Vulpes vulpes) cubs playing near the entrance to their den at dusk, Somerset, England, UK, May.
Guy Edwardes / Grey Seal (Halichoerus grypus) playing in waves at Donna Nook, Lincolnshire, England, UK, January.
Guy Edwardes / Grey seals (Halichoerus grypus) females playing on beach at Donna Nook, Lincolnshire, England, UK, January
Andy Rouse / African Lion (Panthera leo) cubs age 2 months playing, Masai Mara, Kenya
Karine Aigner / Person with lure playing with cats at the Kawaramati Cat Cafe, Kyoto, Japan
Denis-Huot / Lioness (Panthera leo) playing with litter, Masai-Mara Game Reserve, Kenya
Paul Hobson / Red fox (Vulpes vulpes), two cubs play fighting. Sheffield, England, UK. May.