Little is known about the biology of this species. Like other squirrel monkeys, the red-backed squirrel monkey is active during the day and is arboreal (6). This small primate is omnivorous and spends most of the morning and afternoon foraging in the trees for fruits, leaves, buds, gums, insects and small vertebrates (7). It has been reported that this species recognises the 'leaf-tents' constructed by some fruit-eating bats and attacks these structures to extract the bats roosting within (8).
Red-backed squirrel monkeys are social primates. They live in large multi-male / multi-female groups of about 24 individuals on average, and travel between 2.5 and 4.2 kilometres a day, with home ranges of 0.175 square kilometres (2) (6) (9). Reproduction is seasonal, with mating occurring in January and February (2), and single births occurring at the period of greatest food availability. This ensures there will be adequate food available for the females and their young, and requires less time spent foraging (10).