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 ...

Rather, the monkey "stayed close to the deer and chased away other male macaques" in a behavior that mirrored the protective practice of mate guarding, the study reports. Aside from the deer ...

Barbary macaque troops are also matriarchal ... but heterosexual sexual access (mate choice) is female-driven and mostly follows the dominance hierarchy, meaning that females prefer males of ...

males tend to leave at the age of 5 or 6 to find another group in which to mate. This puts the primates at added risk when habitat is broken up, as it is near the town of Valparai, in Tamil Nadu.

Low-ranking Japanese macaques (Macaca fuscata), for example, masturbate to keep their sperm fresh for when they get a rare chance to mate. But the questions of when and why masturbation evolved in ...

Wildlife photographer Atsuyuki Ohshima captured a rare interaction between a macaque and a deer. The photographer says the macaque took a ride on the deer just for fun. The photo is recognized in ...