An adult female chim­panzee arrives at a ter­mite nest with two fish­ing probes. She trans­fers one fish­ing probe to her off­spring, who uses it to fish for ter­mites, while retain­ing the other tool for her own use. Arriv­ing at the ter­mite nest with mul­ti­ple tools helps to buffer tool donors against the cost of trans­fer­ring a tool. (Video: Cour­tesy of Goualougo Tri­an­gle Ape Project.)

Related Videos