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Scientists Say Japanese Monkeys Are Having 'Sexual Interactions' With Deer


An adolescent female Japanese macaque on the back of a male sika deer. Researchers have looked into some macaques

Researchers witnessed adolescent female Japanese macaques mounting sika deer in ways that were “sexual in nature.” They have several theories for why, but say more research is necessary.

(Image credit: Courtesy of Noëlle Gunst)