The collared mangabey has reddish hair on its crown and striking white eyelids against a dark face. It is active by day and spends much of its time on the ground, though it also climbs through trees.
The crown hair is coppery red, while the coat is mainly gray and white. Snow-white eyelids stand out against the dark face.
It is active by day and spends much of its time on the ground, but also climbs and leaps through the middle and upper canopy. It mainly eats fruit and nuts, along with insects and other small animals.
An extinction-risk assessment has not been added yet.