The silvered leaf monkeys (Trachypithecus cristatus) live in coastal, mangrove, and riverine forests in Peninsular Malaysia, Sumatra, and Borneo. They are almost exclusively herbivorous. They thrive primarily on leaves; only nine per cent of their diet constitutes fruits, seeds, and flowers. They have a sizeable three-chambered stomach to aid digestion to digest the cellulose found in the hard-to-digest leaves. This digestive system allows for the fermentation of plant matter, much like the stomach of other ruminants like cattle and buffaloes.