Two different groups of macaques have been spotted in Japan mounting sika deer. The behavior could be part of a shared ...

Evolutionary biologist Nathan H. Lents details how animal relationships can offer perspective on sexual diversity, social ...

In polygyny, one male mates with multiple females during a breeding season. This is the mating system of some primates, lions, and deer ...

Animals also choose their mates, sometimes with a great deal of care. Mating systems are important to understand because they reflect the result of natural selection on mate choice, and ultimately ...

Scientists, stumped by that question throughout the animal kingdom, hypothesized that something more than chemistry drives mate choice. Looks are certainly important for the peacock, with his ...

All animals need to make copies of themselves ... new copy if they mix together males and females. That's what we call mating. Females get pregnant after mating. And if they're insects, or ...