Ben Cranke / Black-striped capuchin (Sapajus libidinosus) using rock as a tool to break open palm nut, Parnaiba Headwaters National Park, Piaui, Brazil. July.

Jabruson / 'Kith' / 'Kin' Sumatran orangutan (Pongo abelii) captive animal in walled enclosure, Perth Zoo, Western Australia, August 2001.

Eric Baccega / Chimpanzee (Pan troglodytes) female aged 37 years, portrait. Beauval Zoo Parc, France. Captive.

Merryn Thomas / Squirrel monkey (Saimiri) holding fence, captive, Ecuador. November.

Denis-Huot / Okapi (Okapia johnstoni) feeding, with tongue exteneded. Captive at zoo. Occurs in Ituri Rainforest, Democratic Republic of the Congo.

Karl Ammann / Frustrated male Chimpanzee {Pan troglodytes} Chimfunshi sanctuary, Zambia

Pal Hermansen / Melodius blackbird (Dives dives) attempting to catch a butterfly which is flying behind a plexiglass window, Costa Rica.