Here's a bit more about their social structure:
* Troops are led by a dominant male. He usually has the largest and strongest body, and enjoys the most mating opportunities.
* The troop is made up of adult females, juveniles, and infants.
* Females stay in their natal troop (the troop they were born into), while males typically disperse to other troops when they reach adulthood.
* Strong social bonds exist within the troop. They communicate through a variety of vocalizations and body language, and groom each other to maintain social bonds.
Their social structure is important for their survival. Living in groups allows them to:
* Share food resources.
* Defend themselves against predators.
* Care for their young.
* Learn foraging techniques and other skills.