It is described with a glossy black coat and a crest on the head. Sources do not settle whether it is a distinct species or a dark form of a close relative.
The guide describes a glossy black coat and a crest. It also notes the possibility that this is a dark form of a close relative.
Colobine monkeys are mainly arboreal and commonly eat young leaves and unripe fruit. This is subfamily-level information, not a species-specific field study of this langur.
An extinction-risk assessment has not been added yet.