Vervet monkey are complex but stable social groups (also called troops) of 10 to 50 individuals mainly consist of adult females and their immature offspring. Males move freely in and out of these groups. Within the troop, each adult female is the center of a small family network. Females who have reached puberty generally stay in the troop.
Grooming is important in a monkey’s life. Vervets (as well as most other primates) spend several hours a day removing parasites, dirt or other material from one another’s fur. In the primates’ hierarchy, dominant individuals get the most grooming. The hierarchical system also controls feeding, mating, fighting, friendships and even survival