Denis-Huot,Denis-Huot / Lion (Panthera leo) cubs playing, Masai-Mara Game Reserve, Kenya
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Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) juvenile rolling around on newly formed pack ice, Beaufort Sea, off the 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska
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Eric Baccega / Grizzly bear cub (Ursus arctos horribilis) resting in the sedges, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.
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Mark Taylor / Tabby male kitten, Fosset, 3 months old, rolling playfully on his back.
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Chris Gomersall / 2020VISION / European river otter (Lutra lutra) cub lying on back and drying itself on seaweed, Shetland Isles, Scotland, UK, October.
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Steven Kazlowski / Polar bear (Ursus maritimus) sow and cub sliding on their backs over the pack ice, much like ice skating, 1002 coastal plain of the Arctic National Wildlife Refuge, Alaska, USA
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Nick Garbutt / RF- Young Ring-tailed lemurs (Lemur catta) carried on mother's back, Madagascar. (This image may be licensed either as rights managed or royalty free.)
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Carol Walker / Wild horse / mustang, mare rolling, Pryor Mountains, Montana, USA, July
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Simon Colmer / Blue bottle fly (Calliphora vicina) lying upside down, dead, on white background, Sussex, UK
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Andy Rouse / Mountain Gorilla (Gorilla beringei) infant riding on its mother's back. Rwanda, Africa
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Mark Taylor / Black kitten, 7 weeks, rolling on its back.
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Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) female baby 'Petra' aged 12 months hanging upside down from her mother. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia, Ju...