The Olalla brothers’ titi monkey is a small primate of gallery forests in western Beni, Bolivia. It has long reddish-brown fur, white ear tufts, and a dark gray tail, and lives in small family groups.
Its body is reddish brown, with relatively long fur that gives it a fluffy appearance. The tail is dark gray, the ear tufts are white, the head is vertically elongated, and the hands and feet are mostly black.
It is monogamous and lives in family groups of up to five. Fruit is the main food, with leaves also important. Its forests occur as patches along rivers within the surrounding savanna.
IUCN Red List · Critically Endangered (CR) · Global