A sifaka (/sɪˈfɑːkə/; Malagasy pronunciation: [ˈsifakə̥] ⓘ) is a lemur of the genus Propithecus from the family Indriidae within the order Primates.

[4] Sifakas are medium-sized indriids with a head and body length of 40 to 55 cm (16 to 22 in) and a weight of 3 to 6 kg (6.6 to 13.2 lb).

On the ground, they move like all indrids, with bipedal, sideways hopping movements of the hind legs, holding their fore limbs up for balance.

[8] Predators of the sifaka include the fossa, a puma-like mammal native to Madagascar, and aerial hunters such as hawks.

[11] Conservative estimates show that the utilization of fire for slash and burn cultivation, cattle raising, logging, and mining activities has contributed to the loss of 52% of the forested land since the 1950s, impacting the survival of sifakas.

For instance, Perrier's sifaka relies solely on vast forest cover, so little to no institutions are addressing these threats or the species' conservation status.