Jabruson / Chimpanzee (Pan troglodytes schweinfurthii) in cage, confiscated from poachers, housed in Epulu, Okapi Wildlife Reserve, Orientale Province, North-East, Democratic Republic of Congo

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.

Ingo Arndt / Graves to Mountain gorillas including Digit {Gorilla beringei} Parc des Volcans, Rwanda

Ingo Arndt / Orang utan holding twig and feeding {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra

Andy Rouse / Red squirrel (Sciurus vulgaris) reaching upwards, UK. March, Captive.

Pedro Narra / Bornean Orangutan (Pongo pygmaeus) hand and fingers holding branch, Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) male 'Frodo' aged 35 years close-up of hand. Gombe National Park, Tanzania.

Barrie Britton / Aye aye {Daubentonia madagascarensis} probing for grubs in bark with long digit, captive

Jabruson / Gorilla graveyard, Parc National des Volcans, Virunga, Dem Rep Congo

Anup Shah / Chimpanzee juvenile with hand open showing thumb, Gombe NP. Tanzania 2002

Gerry Ellis / Digit's grave marker in Hagenia forest behind Karisoke Research Center, Parc National Des Volcans, Rwanda

Franco Banfi / Two female Sperm whales (Physeter macrocephalus) swimming in open ocean, with Canopener in front and Digit in back. Dominica. Caribbean Sea, Atlantic Ocean. Photo taken under permit.