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
Red-bellied titi whenever two from the same social group are by each other. The red-bellied titi has a variety of postures and facial expressions that it uses as visual signals. Swaying the entire body, turning the head sideways and lowering the head to face downward are examples of these signals. Observers have seen that these signals are a response to a disturbance or escape tendencies. Arching of the back is a signal that the red-bellied titi uses to warn that they're about to attack. This signal is associated with hostility, after they arch their backs an attack usually follows. Other signals associated