The collared titi is a diurnal monkey of forests in northwestern Brazil. White fur around the neck and on the hands contrasts with its darker coat.
Its usual coat is glossy reddish to blackish brown, with white fur around the neck and on the hands. The face is gray.
It is active in trees by day and eats mainly fruit. Leaves, seeds, and invertebrates are also reported when food is scarce.
IUCN Red List · Least Concern (LC) · Global