The Ruffed Lemur is the largest living True Lemur. Usually one, although twins are not rare. Gestation 117-150 days. Weaned in about 2 months, but may suckle for 5 months. Maturity in 1.5-2.5 years, female often 1 year before males.
Most large lemurs are social, led by a dominant female.
Some live in family groups of a mated pair and their offspring. Each lemur species specialises in its own niche and there is little geographical or habitat overlap for lemurs of similar size. For example, the Red-fronted Lemur, the most common species, is widely distributed in west coast forests. While the Ruffed Lemur is found only in the lush wet east-coast rainforest. And the Brown Lemur occurs mainly on the north-west coast.