Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon
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Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon
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Anup Shah / Western chimpanzee (Pan troglodytes verus) juvenile female 'Joya' aged 6 years using rocks as tools to crack open palm oil nuts, Bossou Forest, Mont Nimba, Guinea. December 2010.
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Mary McDonald / Black striped capuchin (Sapajus libidinosus) using rocks to crack nuts, Piaui, Brazil
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Mary McDonald / Brown Capuchin (Cebus apella) using rocks to crack nuts, Piaui, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) pair using rock and anvil to crack open Piassava Palm (Attalea funifera) nuts, Cerrado habitat, Piaui State, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) using a rock to crack open a Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) using a rock to crack open a Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil
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Pete Oxford / Hyacinth Macaw (Anodorhynchus hyacinthinus) cracking open a Piassava Palm (Attalea funifera) nut to drink the milk, Brazil
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Michael W. Richards / Chimpanzee troupe nut cracking in rainforest clearing (Pan troglodytes) Tai Forest, Ivory Coast, Africa
