The black-crested mangabey has a black coat, grey cheek whiskers, and a narrow crown tuft. It searches for fruit and seeds in the middle and upper forest canopy and seldom descends to the ground.
Its coarse coat is entirely black, with long grey cheek whiskers swept back from the face and a tall, thin tuft on the crown.
It uses primary and secondary moist forest, especially the middle canopy, and seldom descends to the ground. Fruit and seeds form much of its diet; nectar is important in some months at Salonga.
An extinction-risk assessment has not been added yet.