Along with the diademed sifaka, the indri is the largest lemur still in existence. It has a head-body length of 64–72 cm (2.10–2.36 ft) and can reach nearly 120 cm (3.9 ft) with legs fully extended. It can weigh between 6 and 9.5 kg (13 and 21 lb), though the average is on the lower end of the range. The indri is a vertical clinger and leaper and thus holds its body upright when traveling through trees or resting in branches. It has long, muscular legs which it uses to propel itself from trunk to trunk. Its large greenish eyes and black face are framed by round, fuzzy ears that some say give it the appearance of a teddy bear. Unlike any other living lemur, the indri has only a rudimentary tail. The silky fur is mostly black with white patches along the limbs, neck, crown, and lower back. Different populations of the species show wide variations in color, with some northern populations consisting of mostly or entirely black individuals. The face is bare with pale black skin, and it is sometimes fringed with white fur. IUCN Redlist: Endangered Threats: The primary threats to its existence are habitat destruction and fragmentation due to slash and burn agriculture, fuelwood gathering, and logging. This kind of destruction occurs even in protected areas.
This lemur inhabits the lowland and montane forests along the eastern coast of Madagascar, from the Réserve Spéciale d’Anjanaharibe-Sud in the north to the Mangoro River in the south.
The Indri are famed for their "singing" which can be heard several kilometres away, video of them singing can be seen here: http://www.flickr.com/photos/victoriahil...