This macaque lives in rainforest in northwestern Sulawesi. It is active by day and spends much of its time in trees.
The back is mostly black and the forearms are dark brown. The shanks vary from brown to pale grey, and the crown crest is less prominent than in neighboring species.
It inhabits undisturbed or lightly disturbed primary rainforest, from near sea level to 1,600–1,800 m. It is active by day and largely arboreal.
An extinction-risk assessment has not been added yet.