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

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

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

Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon

Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon

Cyril Ruoso / Chimpanzee (Pan troglodytes) young using a leaf to drink, Gabon

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

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.

Anup Shah / Western chimpanzee (Pan troglodytes verus) young male 'Jeje' aged 13 years using a tool made from a stem for 'Algae Scooping', Bossou Forest, Mont Nimba, Guinea. December 2010.

Konrad Wothe / Chimpanzee (Pan troglodytes) fishing for ants with stick, Mahale Mountains National Park, Tanzania, East Africa

Terry Whittaker / 2020VISION / Lesser black-backed gulls (Larus fuscus), Herring gulls (Larus argentatus), Black-headed gulls (Larus ridibundus) and Starlings (Sturnus vulgaris) feeding on landfill site, Pitsea, Essex, England, UK,...