The douc langur is a folivorous species, but it also consumes fruit. This species prefers to eat immature leaves over more mature ones. This species does not drink water rather it derives water from the food it eats. This is an arboreal and diurnal species. The social system of the douc langur varies between a unimale and a multimale-multifemale system depending upon the location.
Females have a higher tendency to groom males in multimale groups than in unimale groups.
The douc langur gives birth to a single offspring. Burton, F. 1995. The Multimedia Guide to the Non-human Primates . Canada Inc. Fleagle, J. G. 1988. Primate Adaptation and Evolution.