Since methods for genetic paternity analyses were introduced it became clear that many pair-living animal species, including humans, do not take partnership fidelity that seriously. In most species ...

An evolutionary biologist at The University of Texas at Arlington is studying seasonal weight gain in male squirrel monkeys to determine its relationship to the species’ potential to sire offspring.

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 ...

Source: Sofya Dolotovskaya, used with permission. Many birds and mammals are socially monogamous—males and females pair up, live together, and often raise their young together. However, once methods ...