Barbara Brown's titi found between the Paraguaçu River (north) and Salvador (south), and west towards Mirorós. The estimated population is 260 individuals and is decreasing. The blond titi prefers habitats in caatinga a dry scrubland with preferences for dense arboreal caatinga. They do tend to be largely arboreal forest dwellers, and the blond titi monkey probably rarely descends to the ground. They are small in size and are agile primates, they are good climbers through the branches on all four limbs, using their rear limbs to jump long distances, grasping onto branches with leading forehands. While resting, they hunch their body, hanging the
White-eared titi be quite tolerant of habitat disturbance. In Bolivia, the white-eared titi is found in the upper parts of the Mamoré, Grande, and San Miguel river basins, east of the Manique River in Beni and in the forests surrounding the city of Santa Cruz de la Sierra. Its range extends north to southern Rondônia in Brazil. The white-eared titi is considered to be of least concern on the International Union for Conservation of Nature (IUCN) Red List. The species is not considered threatened due to its adaptability and abundance over a relatively wide range, and despite having a decreasing population trend