offspring, and a baby born within the study period. The family was observed to live in bamboo stands and low forests with trees with a mean height of 6.8 meters. The family used only five sleeping sites during the year-long study time, two of them only rarely. Sleeping and resting was the most common activity, followed by traveling, and then eating and foraging. The P. oenanthe also socialized with others of their own kind. However, forest degradation and disturbed habitats had a negative effect on P. oenanthe sociability. Diet The diet of the Rio Mayo titi consists of mostly leaves, seeds, fruits, and arthropods. In one study, it was found that 54% of their diet was fruit, and 22% insects (consisting of at least 10 different types of insects), with the remainder consisting of leaves, tendrils, meristems, flowers and seeds. The 22% of the P. oenanthe diet that consists of insects is gathered in a variety of ways. There are three main types of foraging technique that the species uses to catch insects: lunging and grabbing exposed prey, biting and inspecting hidden prey, and stealth foraging or scanning for prey. Out of the three techniques, the most frequently used technique for hunting insects was found to be lunging and grabbing exposed prey. They have a high success rate of catching insects, reaching up to 83%. This species' ability to hunt insects so easily is especially important for survival in times of scarce food availability. Appearance The appearance of the Rio Mayo titi varies based on their location. In one part of Ecuador, the titis were seen to have reddish brown fur on their back, limbs and chest and lighter reddish brown fur in the on the outside of their limbs. They had a dark brown-red forehead, sideburns and beard and small white tufts of fur coming out of their ears. They had a light colored throat, black hands, tail and nails and cream colored underparts with white hairs on their muzzle. Their fur was short and spikey. In another part of Ecuador, the titis had a light red fur on their forehead, sideburns and beard, quite a lot of fur by their ears, dark hands with white fur on them, red underparts and chest, a gray tail and whitish hair above their nose, eyebrows and muzzle. Their fur was frizzy. Diseases The cestode Atriotaenia megastoma has only recently been studied