White-eared titi of 11.5 hours, 2.7 hours of which is spent feeding. Titi monkeys sleep on branches at least above the ground. In the same manner as resting during the day, titi monkeys huddle together and twine tails to sleep. Though there is little published research on the diet of the white-eared titi, titi monkeys in general are omnivores that eat fruit, leaves, insects, and seeds. They mostly eat leaves, especially protein-rich young leaves and leaf buds, so a significant period of the day is spent resting to digest the cellulose. They consume more than 100 different species of plants and fruit.
Ornate titi as the white-tailed titi, but is now officially recognized as its own species. The ornate titi is also terrestrial. The ornate titi is present on the IUCN Red List of endangered species, being recognized as “Vulnerable”, and having a general decrease in population trends. The ornate titi has a thick, dense, fluffy, coat, with white ears and forehead, and grey hands and feet. The rest of the body is a bright chestnut red, apart from the tail, which is a dark-reddish brown or black, becoming white at the tip, and, similar to most titi species, is longer than its body.