Monkeys communicate with one another in various ways. For example, a male rhesus monkey threatens members of its group by staring, opening its mouth and showing its teeth, bobbing its head, and slapping the ground with its hands. Social grooming helps maintain friendly relations between baboons. In grooming, one baboon carefully cleans the fur of another. Both animals seem to find satisfaction in this activity.
Baboons spend several hours a day grooming.
Marmosets and tamarins make up the marmoset family, Callitrichidae. All the other New World monkeys belong to the New World monkey family, Cebidae. Old World monkeys make up the Old World monkey family, Cercopithecidae. Randall L. Susman, Ph.D., Professor of Anatomical Sciences, State Univ. of New York, Stony Brook. How to cite this article.