Caquetá titi agricultural activity, and dispersal is hazardous since it must cross open savanna or barbed wire in order to reach new nearby forest fragments. The species has a geographic range of just about and actually occupies only about within that range. All 13 groups studied consisted of a single adult male, a single adult female and between one and four immature monkeys. Average group size, including adults and immatures, was 4.1 monkeys. This is consistent with other titi monkey species, which form small, cohesive groups led by a bonded pair of adults. Like other titi monkey species, they are monogamous and
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