Collared titi in about 1904 from Maipures, which may have been a captive animal obtained in the village, since extensive and concerted efforts have failed to identify it for the entire area mentioned above; nor is it known by locals for this area. The nearest titi monkeys from Maipures in Colombia are found on the middle Tuparro River and south of the lower Vichada River. Outside of Colombia this species extends from the Napo River northward throughout the Ecuadorian and Peruvian Amazonia and throughout southern Venezuela to the Río Branco and the lower Río Negro in Brazil. South of the Amazon it
Coimbra Filho's titi of Bahia and Sergipe in coastal northeastern Brazil. Coimbra Filho's titi, like most titis, is a folivore-frugivore, with a diet consisting mostly of leaves, but also including various fruits. Coimbra Filho's titi generally lives in small groups consisting of three to five members. Such a group generally contains a breeding pair and its direct offspring that have yet to reach sexual maturity. However, upon reaching sexual maturity, individuals leave their natal groups, and often immigrate to new areas. Their range size varies, with some occurrences recorded of ranges as small as , and others larger than . Coimbra Filho's titi