This species will also eat leaves, flowers, and mushrooms. This species is diurnal and is both arboreal and terrestrial. Group sizes range from 4 to 35 individuals. The DeBrazza's monkey has a unimale social system with a polygynous mating system. Occasionally males try to over-take the resident male, but this does not always lead to a success.
Males disperse from their natal groups.
This call is given when the individuals becomes separated from the troop. DeBrazza's monkey gives birth to a single offspring. Burton, F. 1995. The Multimedia Guide to the Non-human Primates . Prentice-Hall Canada Inc. Cords, M. 1987.