The blond titi is arboreal and diurnal, meaning it is most active during the day. Besides this, very little is known about the behavior and lifestyle of the blond titi, and it must be inferred from other species until more thorough research is conducted. 

What is known is that they rarely descend to the ground and use all four limbs (quadrupedalism) to navigate their environment. They use their rear limbs to jump long distances and their leading forelimbs to grasp onto branches. While resting, they hunch their bodies, hanging their tails over a branch. This way of getting around is adapted to the structure of Caatinga scrubland and semi-deciduous forest, as trees are often shorter, have more gaps between them than in dense rainforests, and their branches may be thin or irregular. A small-bodied monkey adapted for agile climbing and leaping is well-suited to navigating this patchy environment. Titis as a whole have several traits useful for this kind of movement: relatively long hind limbs for leaping, grasping hands and feet, flexible joints, and a long tail used mainly for balance. Rather than making extremely long leaps or traveling quickly across huge areas, titis usually move carefully through established routes inside a relatively small home range. This cautious movement helps to reduce their exposure to predators, conserve energy in a resource-limited environment, and to maintain familiarity with food trees.

Titi monkeys as a whole are most active during the early morning and late afternoon, when they forage for food. They usually rest during the middle of the day, when temperatures are at their highest. In the semiarid Caatinga, daytime temperatures can become intense, so conserving water and energy is important! A typical daily activity budget for the blond titi likely includes: substantial time spent feeding and foraging; long resting periods; moderate amounts of time spent traveling through the canopy; smaller, but socially important periods of grooming and pair bonding; as well as continual vigilance for predators.

Studies of other titi monkey species often find that resting occupies a very large portion of the day — sometimes around one-third to one-half of total activity time — with feeding and movement making up most of the remainder. Blond titis likely follow a similar pattern, perhaps with even more time spent resting during the hot dry season.

Because fruit availability in the Caatinga fluctuates strongly with rainfall, feeding behavior very likely changes seasonally. During wetter periods, blond titis may spend more time feeding on abundant fruit resources and less time traveling. During dry periods, when food is scattered and many trees lose leaves, they may travel farther, feed more selectively, rely more heavily on leaves or supplemental foods, and reduce energy expenditure by resting longer and more frequently. Their small group sizes also likely reflect the patchy food supply of dry forests, since smaller groups need to compete less intensely for limited resources.

Blond titis, like other titis, most likely sleep directly on tree branches, often in dense vegetation and likely close together as bonded family groups. No nests here!

Once again, because the blond titi is rare and poorly studied, we are unsure which animals, except for domestic dogs and cats, eat titis. However, based on observations of other titi monkeys and the predator community of the Caatinga and Atlantic Forest transition zones of northeastern Brazil, several animals are likely predators. These include birds of prey, wild cats, and large snakes. The environmental conditions of the Caatinga likely influence predation risk. Since the Caatinga is heavily fragmented and seasonally dry, blond titis may sometimes need to cross exposed canopy gaps or use lower vegetation layers, making them more visible to predators. During the dry season, when many trees lose leaves, reduced canopy cover may also make hiding more difficult. The blond titi’s preference for denser arboreal Caatinga and semi-deciduous forest patches may partly reflect their need for cover from predators, as well as food availability. Like other titi monkeys, they probably rely on several anti-predator strategies: staying in small cohesive family groups, using alarm calls, freezing or hiding in dense vegetation, rapidly fleeing through the canopy, and remaining highly vigilant at forest edges.