Fruits with large seeds and little flesh, flowers, and pith are also eaten. The maroon leaf-monkey also consumes termite clay for mineral nutrients. Group sizes range from 2 to 13 individuals. Th maroon leaf-monkey is a diurnal and an arboreal species. The maroon leaf-monkey has a unimale social system and a polygynous mating system.
Males emigrate from their natal group shortly before adolescence.
Males also can travel solitarily before they find a unimale group. The maroon leaf-monkey gives birth to a single offspring. Burton, F. 1995. The Multimedia Guide to the Non-human Primates . Hall Canada Inc. Fleagle, J. G. 1988.