Collared brown lemurs live in multimale-multifemale groups of around 3 to 12 individuals, although group sizes of 29 individuals have been observed. Breeding is seasonal with mating occurring between June and July. The gestation period is approximately 120 days, with infants born between September and November (5). A single offspring is usual, although twins have been reported (2). Collared brown lemurs reach sexual maturity between one and two years, and the lifespan in the wild is thought to range between 20 and 25 years (2) (5). This species is cathemeral, meaning it is active at varying times throughout the day and night. Fruit forms the bulk of this lemur's diet (4), although young leaves, flowers, bark, sap, soil, insects, centipedes and millipedes may also be eaten (6).
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