The hind legs are longer than their fore limbs, their hands are long and thin, and their thumbs cannot be opposed to the other fingers correctly.

When on the ground, they stand upright and move with short hops forward, with their arms held high.

Indriidae live together in family federations up to 15 animals, communicating with roars and facial expressions.

Like some other herbivores, they have a large cecum, containing bacteria that ferment cellulose, allowing for more efficient digestion of plant matter.

[6] They have fewer premolar teeth than other lemurs, with the dental formula of: 2.1.2.32.1.2.3 Females and males usually mate monogamously for many years.