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BiologySanford's brown lemurs live in multimale-multifemale groups, generally numbering between four and seven in rainforest areas, but as large as 15 in dry forest regions. Breeding is seasonal with singleinfants generally born in September or early October after a gestation period of approximately 120 days. Brown lemurs reach sexual maturity between one and three years, and the lifespan in the wild is believed 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, although mature leaves, flowers, bark, sap, soil, insects, centipedes and millipedes will also be eaten (2) (6).