Benjamin Barthelemy,Benjamin Barthelemy / Ibex (Capra Ibex) fighting, Aiguilles Rouges National Nature Reserve, Haute-Savoie, France, June
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Anup Shah / Juvenile Tawny or African Sea Eagle defending flamingo carcass from Marabou stork {Lepitoptilos crumeniferous}
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Owen Newman / Male Red kangaroos fighting {Macropus rufus} Sturt NP, New South Wales Australia
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Terry Whittaker / Two Arctic fox (Vulpes lagopus) cubs playing together near den, Hornvik, Hornstrandir Nature reserve, Iceland, July.
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Terry Whittaker / Arctic fox (Vulpes lagopus) cubs playing with feather, playfighting and chasing each other near den, Hornvik, Hornstrandir Nature reserve, Iceland, July.
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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.
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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.
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Tui De Roy / Wolf giant tortoise (Chelonoidis becki) two males fight briefly over mating rights. Wolf Volcano, Isabela Island, Galapagos
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Shane Gross / Two grey triggerfish (Balistes capriscus) fight over a large piece of plastic floating at the surface among sargassum seaweed (Sargassum natans) in the Sargasso Sea, Atlantic Ocean.
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Danny Green / Reindeer (Rangifer tarandus), two play fighting in snow. Svalbard, Norway, April.
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Danny Green / Polar bear (Ursus maritimus) female and cubs play fighting. Svalbard, Norway, March 2018.
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Ann & Steve Toon / African elephants (Loxodonta africana) herd silhouetted at sunset. Chobe National Park, Botswana.
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Alex Mustard / Two female Common seahorses (Hippocampus kuda) fighting over territory on the seabed. The brief fight was preceeded by a ritualised, synchronised parade. Bitung, North Sulawesi, Indonesia. Lembeh Stra...
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Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.
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Marie Read / Canada geese (Branta canadensis) two during territorial fight in early spring, Ithaca. New York, USA
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Klein & Hubert / Mustang stallion kicking out after winning fight. Rocky Mountains, USA, June.
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Paul Hobson / Red fox (Vulpes vulpes), two cubs play fighting. Sheffield, England, UK. May.
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Axel Gomille / Wolf (Canis lupus), young wolves play fighting in meadow, Saxony-Anhalt, Germany.
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Giri Cavale / Melanistic leopard / Black panther (Panthera pardus) on territorial patrol on track, Nagarahole National Park, Nilgiri Biosphere Reserve, Karnataka, India.
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Klein & Hubert / Meerkats (Suricata suricatta) juveniles playfighting in Kalahari Desert, South Africa.
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SCOTLAND: The Big Picture / European river otter (Lutra lutra) cubs play fighting, Shetland, Scotland, UK, May.
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Neil Aldridge / Plain's zebra (Equus quagga) biting the neck of a rival during a fight Hluhluwe imfolozi Park. South Africa.
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Sergey Gorshkov / Arctic fox (Alopex lagopus) juveniles play fighting, Wrangel Island, Far East Russia, August.
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Anup Shah / Southern plains grey langur / Hanuman langur (Semnopithecus dussumieri) juveniles playing. Jodhpur, Rajasthan, India. March.
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Anup Shah / Southern plains grey langur / Hanuman langur (Semnopithecus dussumieri) juveniles playing . Jodhpur, Rajasthan, India. March.
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Bence Mate / African wild dogs (Lycaon pictus) play fighting, Mkuze, South Africa
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Wim van den Heever / White tailed eagle (Haliaeetus albicilla) caught in a fight. Hokkaido Japan, March.
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Klein & Hubert / Polar bear (Ursus maritimus) play fighting on ice male biting female on the neck, Svalbard, Norway.
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Klein & Hubert / Polar bear (Ursus maritimus) play fighting on ice pair fighting, male on right and female on left, Svalbard, Norway.
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Alex Mustard / Galapagos sea lions (Zalophus wollebaeki) young playing in shallow water. Floreana Island, Galapagos Islands, Ecuador. East Pacific Ocean
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Yukihiro Fukuda / Japanese macaque (Macaca fuscata fuscata) rare white furred baby playing with another baby. Jigokudani Valley, Nagano Prefecture, Japan. June.
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Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.
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Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.
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Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.
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Espen Bergersen / Atlantic puffin (Fratercula arctica) two fighting in snow, Hornoya bird cliff, Finnmark, Norway. March.
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Espen Bergersen / Atlantic puffin (Fratercula arctica) two birds fighting at nesting ground, Hornoya bird cliff, Finnmark, Norway. March.
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Kristel Richard / Two wild Przewalski / Takhi Horse (Equus ferus przewalskii) stallions play fighting Hustai National Park, Tuv Province, Mongolia. Endangered species. September.
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Roy Mangersnes / Polar bears (Ursus maritimus) courting on ocean ice north of Spitsbergen, Svalbard, Norway, July.
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Andy Rouse / Bengal tiger (Panthera tigris tigris) female 'T19 Krishna' with 11 month cub, Ranthambore National Park, India.
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Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.
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Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.
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Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month old cubs play fighting, Ranthambhore National Park, India.
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Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.
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Andy Rouse / Mountain hares (Lepus timidus) boxing in snow, Scotland, UK, December.
