White-eared titi Titi monkeys will also eat small insects (ants, moths, butterflies, and their cocoons), spiders, and can catch flying prey if it comes close to them. During the dry season there is an increased feeding time on leaves, and during lactation it is thought insect consumption increases to augment the protein content of the diet. The titi monkey may travel between during the day, and can maintain a home range of . During the dry season there is less fruit available and therefore less need to travel large distances, so the day range may only be a third of the usual
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