Young are weaned after about six months and reach full maturity at the age of two to three years. The life expectancy of the sifakas is up to 20 years. Threats 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. Classification Family Indriidae Genus Indri Genus Avahi Genus Propithecus P. diadema group Diademed sifaka, P. diadema Milne-Edwards's sifaka, P. edwardsi Silky sifaka, P. candidus Perrier's sifaka, P. perrieri P. verreauxi group Coquerel's sifaka, P. coquereli Verreaux's sifaka, P. verreauxi Von der Decken's sifaka, P. deckenii Crowned sifaka, P. coronatus Golden-crowned sifaka, P. tattersalli References External links Primate Info Net Propithecus Factsheets New York Academy of Sciences Podcast National Geographic's Sifaka page Sifakas Taxa named by Edward Turner Bennett