Cyril Ruoso / Long-tailed Macaque (Macaca fascicularis) using stone tool to break shell, Khao Sam Roi Yot National Park, Thailand
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Cyril Ruoso / Long-tailed Macaque (Macaca fascicularis) using stone tool to break shell, Khao Sam Roi Yot National Park, Thailand
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Cyril Ruoso / Chimpanzee (Pan troglodytes) using stick to forage for prey in small tree cavity, Bossou, Guinea
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Cyril Ruoso / Chimpanzee (Pan troglodytes) using stick to forage for prey in small tree cavity, Bossou, Guinea
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Dave Bevan / Herring gull (Larus argentatus) hunting for worms, stamping on ground with feet, Ceredigion, Wales, UK, November.
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Philippe Clement / Jackdaw (Corvus monedula) pulling up a peanut string to feed, Belgium
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Konrad Wothe / Chimpanzee (Pan troglodytes) in a tree using pieces of grass to pull ants from a hole to eat, Mahale Mountains National Park, Tanzania.
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Konrad Wothe / Chimpanzee (Pan troglodytes) in a tree using pieces of grass to pull ants from a hole to eat, with a baby in the background, Mahale Mountains National Park, Tanzania.
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Konrad Wothe / Chimpanzee (Pan troglodytes) in a tree using pieces of grass to pull ants from a hole to eat, Mahale Mountains National Park, Tanzania.
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Konrad Wothe / Chimpanzees (Pan troglodytes) in a tree using pieces of grass to pull ants from a hole to eat, Mahale Mountains National Park, Tanzania.
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ZSSD / Hawaiian Crow (Corvus hawaiiensis) using stick tool to reach food, native to Hawaii
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ZSSD / Hawaiian Crow (Corvus hawaiiensis) using stick tool to reach food, native to Hawaii
