The silvered leaf monkey is a largely arboreal species, but may spend time foraging on the ground. It feeds predominantly on leaves, preferring the youngest shoots, but also consumes fruits, seeds, flowers and buds (2) (11). Leaf monkeys have a number of adaptations that allow them to deal with this leafy diet. The large, sacculated stomach, like that of ruminants (such as cattle and deer), contains bacteria that can break down cellulose, and the large size of the stomach means it can hold a great volume of food, which is necessary as leaves are nutritionally poor (9) (11).
The silvered leaf monkey generally lives in groups of no more than ten individuals, although groups containing up to thirty individuals have been known (2). Each group usually consists of a single male, who defends and mates with multiple females, although all-male groups do occur as well (6).
The silvered leaf monkey typically breeds once every year, and although this can take place at any time of the year, there is a peak in births between December and May, when there is an abundance of food (6). The gestation period is six months, and typically just a single offspring is born, although twins do occasionally occur (12). The offspring is born well developed, with open eyes and strong forearms, allowing it to cling to its mother (5) (6). Females commonly care for the young of other females in the group (5) (6) (7), and adult males are also known to care for immature group members (13). Once fully matured, the juvenile monkeys generally disperse from the group in which they were born (5). The female silvered leaf monkey reaches sexual maturity at four years of age, whereas the average male does not reach sexual maturity until four and a half years old (12).