Heather Angel / Giant panda (Ailuropoda melanoleuca) sliding down slope on back after losing footing. Panda Breeding Centre, Wolong, Sichuan, China. January 1987.

Lucas Bustamante / Sri Lankan leopard (Panthera pardus kotiya) rolling on its back, Yala National Park, Sri Lanka

Guy Edwardes / View from Colmer's Hill over countryside with low lying mist, Bridport, Dorset, England, UK. April 2016.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 2 years lying on the forest floor. Gombe National Park, Tanzania.

Cyril Ruoso / Bonobo (Pan paniscus) male and female copulating, Lola ya Bonobo Sanctuary, Democratic Republic of Congo

Cyril Ruoso / Giant panda (Ailuropoda melanoleuca) mother and young playing, captive, Sichuan, China. Non-ex

Theo Webb / Female Bonobo (Pan paniscus) tickling her infant, Max Planck research site LuiKotale, Salonga National Park, Democratic Republic of Congo.

Solvin Zankl / Black backed jackal (Canis mesomelas) attacking Cape fur seal (Arctocephalus pusillus) pup, Sperrgebiet National Park, Namibia, December. Sequence 3/6

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother lying on back and holding baby age one year. Parc National des Volcans, Rwanda. Endangered species

Jabruson / Angelique Todd with veterinarians during the anaesthesia of 'Blackback' Western Gorilla (Gorilla gorilla) 'Ngobo'. Gorilla anaesthetised by veterinary team in order to remove wire snare from wrist. Mo...

Jabruson / Long-tailed Pangolin (Uromanis tetradactyla) unfurling itself from protective posture, Lokoue Bai. Odzala-Kokoua National Park, Democratic Republic of Congo.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) herd resting on altitude plateau of Majella Massif, in moonlight with distant urban lights in the background. Endemic to the Apennine mountains. Majella N...