Red-bellied titi adults are close to each other. There is a close association between males and juvenile after the juvenile becomes self-locomoting. Red-bellied titi The red-bellied titi or dusky titi ("Plecturocebus moloch") is a species of titi, a type of New World monkey, endemic to Brazil. It lives in forests and thickets. It has a rounded head and a thick, soft coat and frequently adopts a characteristic posture with the body hunched, limbs close together, and a tail hanging down. The body is 28–39 cm long, and the tail is 33–49 cm. It can move quite fast if necessary but rarely does
Collared titi is found west of the Río Purús to the Yavarí River. The collared titi is seen most frequently in well-developed, tall forest with a closed canopy, usually over terra firme, but not exclusively so. The species also enters extensive várzea forest, especially if the forest is tall and well-developed. Such várzea forest contrasts with the habitat needs of the coppery titi, which also uses várzea forest and more commonly so. But the coppery titi survives in low, vine-covered, "poor" forest where the collared titi is rarely found. It is also known from some gallery forest, north of the Vichada River,