Have strong social tendencies, and are usually found in troops of 15-20. Larger troops are occasionally found. A definite social hierarchy exists in the troop, and this may determine the approachability of individual animals. The troop leader can be aggressive. Are usually nervous, and tend to move or scatter in a group.
Males are larger than females, and act as group leaders, showing aggression if threatened.
Females do not possess the perineal tumescence found in baboons. Are highly social, occurring in troops of up to 100 individuals. The troop has an aggressive, dominant male which may come to the defence of troop members in distress. Can inflict serious wounds with their canine teeth, particularly the males which have canines that are are long and sharpened like a blade along the length of their posterior edge. Juvenile animals are small, and take shelter in the troop when danger threatens.