A male monkey in Japan has been filmed trying to mate with a female deer—likely the first observation of two distantly related species having a nonviolent sexual encounter. Japanese macaques and sika ...

There's some unusual monkey business happening on an island in Japan. On December 11, scientists at the University of Lethbridge in Canada published a paper revealing what appear to be sex acts ...

Northern muriquis, which live in the Atlantic forest of Brazil, are one of the most endangered species of monkey in the world. To better understand what goes on in the mating lives of muriquis, ...