The silky sifaka ("Propithecus candidus"), is a large lemur with long, silky white fur. It has a small range in northeastern Madagascar, where it is known locally as the "simpona". It is one of the rarest mammals on Earth, and is listed by the IUCN as one of the world's 25 most endangered primates. The silky sifaka is one of nine species in the genus "Propithecus". The species is only found within a few protected areas in the rainforests of northeastern Madagascar, with most of the remaining population in Marojejy National Park and Anjanaharibe-Sud Special Reserve.