Indriidae

Indriidae is a primate family within the suborder Strepsirrhini, consisting of three extant genera: Avahi (woolly lemurs), Indri (the indri), and Propithecus (sifakas). Endemic to Madagascar, members of this family are highly arboreal and exhibit a diversity of activity patterns, including diurnal and nocturnal species. The group is notable for its size range, distinctive vocalizations in the genus Indri, and the varied locomotion strategies among its members.

Indri and sifakas are relatively large, diurnal lemurs adapted to vertical clinging and leaping, with sifakas showing characteristic graceful, sideways leaping between trees. Indri indri, the largest living lemur, lacks a long tail and is known for its resonant, loud calls. Woolly lemurs (Avahi) are smaller, nocturnal species with thick fur and long tails, often foraging at night and living in small units or pairs.

Diet and ecology: Indriidae species typically rely on leaves and fruit, with some variation by genus and species. Avahi are primarily folivorous and frugivorous, while sifakas and indris combine leaves with fruit and flowers. All are highly arboreal and depend on Madagascar's forest habitat.

Conservation: Many Indriidae species are threatened by habitat loss, fragmentation, and hunting. Ongoing Madagascar-wide deforestation and climate pressures put populations at risk, and monitoring and protection of forest corridors are essential for the survival of the family.