The Javan surili (Presbytis comata) is a vulnerable species of Old World monkey endemic to the western half of Java, Indonesia, a biodiversity hotspot.

[3] There are two subspecies of the Javan surili: This colobine species has a sacculated stomach to assist the breakdown in the cellulose from the leaves it feeds on.

Leaf monkeys tend to be active during the day, spending up to 5 hours grooming themselves.

The Javan surili occurs in the western half of Java, Indonesia.

[4] The Javan surili lives in primary and secondary lowland rainforests up to an elevation of 2,500 m (8,200 ft).