Young of both sexes dispersed from their natal groups. In another investigation of A. palliata, Neville et al. He also observed that group size averaged 5.4 and that there appeared to be 1 dominant male in the group. Group size in this species varies from 2 to 45, there generally being about 10-20 individuals. The males have a dominance hierarchy and appear to act in concert during travel and vocal battles with other groups.
Females seem to maintain a peaceful relationship among themselves.
A few males live alone but not in complete isolation. In general, groups are closed units, but sometimes they split up and new groups are formed. Occasionally, several groups join in an aggregation of 38-65 animals. Most troops have little or no area of exclusive use, but they do defend the place where they happen to be at a given time. The dawn chorus of loud calls seems to function as a means of preventing direct contact between groups.