Scientists caught a male Japanese macaque red-butted (so to speak) trying to mate with several female sika deer. In the video, a few of the deer try to shake the little monkey off, but others just ...

The bizarre enlarged nose of male proboscis monkeys acts like a trumpet, enabling them to make extremely loud sounds that attract females and intimidate rivals. Until now, researchers have speculated ...

There comes a point in the lives of young owl monkeys when they leave their parents and strike out on their own to find a mate. In a new study of a wild population of Azara's owl monkeys in northern ...