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Public Library of Science

Chimps Sucking Juice through a Straw

Caption: This video shows the "dipping" technique performed by chimpanzee Ayumu. Note that he uses his mouth to insert the tube into the bottle. In form, his technique is identical to the "straw-sucking" technique. However, instead of leaving the tube in and retrieving the juice via sucking, he removes the tube and licks the tip.

Credit: Citation: Yamamoto S, Humle T, Tanaka M (2013) Basis for Cumulative Cultural Evolution in Chimpanzees: Social Learning of a More Efficient Tool-Use Technique. PLOS ONE 8(1): e55768. doi:10.1371/journal.pone.0055768.

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Related news release: Chimp see, chimp learn: First evidence for chimps improving tool use techniques by watching others