Macaque monkeys in two separate Japanese prefectures have taken the primatology world by storm after they were spotted attempting to mate with Sika deer. The phenomenon, originally observed in a ...

In 2015, on Japan’s forested island of Yakushima, a male macaque jumped up onto the back of a female sika deer and started trying to mate with it. At the time, researchers believed that the male’s low ...

Most of the time, troops of macaque monkeys live together in harmony. However, in macaque societies, dominance and troop rank determine everything from access to food to mating rights. So, it’s ...