The eastern woolly lemur typically lives in monogamous pairs, but small groups of up to five related individuals have also been reported (4) (6). As a nocturnal and arboreal species, pairs or groups usually pass the day sleeping huddled together in thick foliage, several metres off the ground (2) (4) (6). Just after dusk, the pairs normally spend some time grooming, before going off to forage alone in the tree canopy, all the while maintaining contact through regular high-pitched whistles. Most foraging activity occurs in the first and last two hours of darkness, with the time in between normally spent resting and grooming (2) (4). When resting, it assumes a characteristic vertical posture by clinging to upright tree limbs and trunks (2) (4) (6). Leaves comprise the vast bulk of this species’ diet, but very occasionally it will also take fruits and flowers (2) (4).
Mature females are thought to be capable of producing a single infant each year, around August and September (4). Initially the young cling to the female’s belly, but when older are transported on the back (2) (4).