White-collared brown lemurs usually live in relatively large multimale-multifemale groups (4). Little research has been conducted into the reproductive biology of this species, but it is likely to be similar to that of other brown lemurs, which breed seasonally with mating occurring between June and July. The gestation period of brown lemurs is approximately 120 days, with infants born between September and November (3). A single offspring is usual, although twins have been reported (2). Sexual maturity is reached at between one and two years, and the lifespan in the wild is thought to range between 20 and 25 years (2) (3).
This species is cathemeral, meaning it is active at varying times throughout the day and night, and feeds predominantly on fruit, supplementing its diet with leaves, flowers and fungi (4).