Ingo Arndt / Orang utan hand holding branch close-up {Pongo pygmaeus abelii} Sumatra, Indonesia

Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) female 'Siswi's' hand holding foot close-up. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia, June 2010. Rehabilitated and...

Edwin Giesbers / Close up face portrait of male Orang Utan (Pongo pygmaeus) Captive, Netherlands

Sue Flood / Woman tourist relaxing in hammock on tropical beach, Deadman's Bay, Peter Island, British Virgin Islands, April 2008, Model released

Norbert Wu / Small-toothed Rock Hyrax (Heterohyrax brucei) group lounging around pool at Mara Serena lodge, closest living relative of the Elephant, feet possess hoof-like nails, Kenya

Alex Hyde / Front flipper of Southern Elephant Seal bull (Mirounga leonina) showing the five nails and webbing between each digit. King Haakon Bay, South Georgia. November.

David Perpinan / Overgrown claw damaging the foot pad in a captive jaguar (Panthera onca)

David Woodfall / Sweat bee (Halictidae) nest hole marked with nails by scientific researchers. Knepp Wildland Project, formerly intensive farmland now turned to conservation and sustainable farming. Horsham, West Suss...

Ingo Arndt / Mountain gorilla (Gorilla gorilla berengei) close up of left hand, Parc des Volcans, Rwanda

Laurent Geslin / Close up of paw of Eurasian beaver {Castor fiber} France

Laurent Geslin / Close up of front paw of Eurasian beaver {Castor fiber} France

Roland Seitre / Brown-throated Three-toed Sloth (Bradypus variegatus) claws around a branch; effective both as climbing-hooks and as defensive weapons against the sloths' main predator, the jaguar. Captive. Aviarios...