Dispersal of the gibbon group on foraging excursions. Due to a largely individual choice of route by the different group members while foraging, more food sources are undoubtedly detected and exploited than if the animals moved together along a common path. Territoriality and monogamy. Each qibbon group restricts its excursions to a certain part of the forest. This may be of advantage for the animals insofar as an intimate knowledge of the area is an aid to early recognition of the fruiting periods in various plant species, especially also where fruiting is inconspicuous as in most plants constituting the meagre food sources, i.e. it provides continuous and comprehensive information about the actual and prospective food supply.
Territoriality affords the gibbon group a.o.