Black-handed spider monkeys are another Atelidae species which display fur rubbing against the leaves of Rutaceae plants. Their scent rubbing behaviour resembles those shown by white-faced capuchins, often done by many individuals simultaneously, creating an interaction among their population and may function in scent marking and olfactory communication. Woolly monkeys also show scent rubbing in the form of chest rubbing that suggests the behaviour has a reproductive function. The reasoning for chest rubbing in woolly monkeys is similar to the throat rubbing displayed by howler monkeys during mating season. Rubbing behaviour in woolly monkeys has also been linked to dominance and social communication.
