Adult male Freud with his mother Fifi, who is giving the pant-hoot call. Communities may be large in other areas, and may be reduced to very small remnant groups. Their social structure can be categorized as fusion-fission. At times many of a community's members come together in large excited gatherings, usually when one fruit is available in one part of the range, or when there is a sexually popular female in estrus. And some individuals travel together more often than others - such as siblings, pairs of male friends, and so on.
Females have their own, somewhat confused, hierarchy.
All adult males dominate all females. Most disputes within a community can, therefore, be solved by threats rather than actual attacks. However, the males of a community regularly patrol their boundaries, and if they encounter individuals of a neighboring community they may attack with extreme brutality. This may result in the death of the victim. The only individuals who can move freely between communities are adolescent females who have not yet given birth.