Unlike some related species, there are no paler markings on the face or body, except for a patch of whitish hair on the groin of females.

[4] Like other langurs, the silvery lutung has a large three-chambered stomach to digest the cellulose found in its herbivorous diet.

The intestine is unusually long, even compared to those of other langurs, and has several pouches along its length, which carry out further fermentation of plant matter.

It inhabits mangrove swamps and nearby forest regions and generally avoids travelling far from coasts or rivers.

[9] Researchers began monitoring the animal and analyzing photos of it as it matured which led to the conclusion it was an extremely rare phenomenon.

During the day, individuals may travel up to 500 m (1,600 ft) through the forest, with some forming all-female subgroups that separate from the group containing the male.

In many other primates, such a displacement would normally be followed by the male-killing any infants sired by his predecessor; although this may occur in silvery lutungs, it has not been directly observed and may be less common than in some other species.

[3] Although less vocal than other closely related species, silvery lutungs make at least thirteen different vocalisations, with the most common being used by adult males defending their territory.

[3] The silvery lutung is a specialist folivore, including a higher proportion of leaves in its diet than any other colobine monkey.

Although it does also eat fruit, and some seeds and flowers, these comprise only 9% of the diet, and it is also able to feed on tougher and more mature leaves than any of its close relatives.

Silvery lutungs are born with orange fur and with white hairless skin on the face, hands, and feet.

[3] Local predators able to feed on silvery lutungs include leopards, tigers, dholes, and some large snakes.

[3] Silvery lutungs are unusually susceptible to human diseases, including AIDS, and have therefore been widely used in medical research.