The indri, also called the babakoto, is one of the largest living lemurs, with a head-and-body length of about 64–72 cm (25–28+1⁄2 in) and a weight of between 6 and 9.5 kg (13 and 21 lb). It has a black and white coat and maintains an upright posture when climbing or clinging.

It is monogamous and lives in small family groups, moving through the canopy, and is herbivorous, feeding mainly on leaves but also seeds, fruits, and flowers. The groups are quite vocal, communicating with other groups by singing, roaring and other vocalisations. Besides humans, it is the only mammal found that can use rhythm.

The name "indri" most likely comes from a native Malagasy name for the animal, "endrina". Another Malagasy name for the animal is babakoto. Babakoto is most commonly translated as "ancestor" or "father".

This lemur inhabits the lowland and montane forests along the eastern coast of Madagascar.

More Info: en.wikipedia.org