New Publication: Chimpanzee Play

The Chimpanzees will have to show us that gender arises from biology!

Here we go…

The Kanyawara girl Chimps seek out and play with sticks as **Dolls**. Meanwhile, the boy Chimps aren’t interested in playing with sticks as dolls. Instead the boy Chimps throw the sticks.

Kibale Chimpanzee Project

Sex differences in chimpanzees’ use of sticks as play objects resemble those of children. Sonya M Kahlenberg and Richard W. Wrangham (2010). Current Biology 20: R1067-R1068
Sex differences in children’s toy play are robust and similar across cultures. Evidence for biological factors is controversial but mounting. In this paper, we present the first evidence of sex differences in use of play objects in a wild primate, in chimpanzees. We find that juveniles tend to carry sticks in a manner suggestive of rudimentary doll play and, as in children and captive monkeys, this behavior is more common in females than in males.

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