The Moor Macaque is endemic to the tropical rainforests and grasslands of the island of Sulawesi in Indonesia. Their diet consists of they eat figs, bamboo seeds, buds, sprouts, invertebrates and cereals. They have brown to black body fur with a pale rump patch and pink bare skin on the rump and are about 55 centimetres in height. They are sometimes called a "dog-ape" because of their dog-like muzzle, although they are no more closely related to apes than any other Old World monkey. Adult male moor macaques do not interact frequently, although the interactions that occur frequently involve affiliation rather than aggression, with greetings being the most common form of interaction. The greetings enable males to show their willingness to invest in the relationship, and may represent one way for adult males to ease social tension and build social bonds. The moor macaque is threatened mostly due to habitat loss from an expanding human population and deforestation to increase agricultural land area. The population is estimated to have decreased from 56,000 to under 10,000 from 1983 to 1994. In 1992, Supriatna et al. conducted an extensive survey and found only 3,000-5,000 individuals of the species. The survey estimated densities to be 25-50 individuals per kilometre. Several Sulawesi macaque species are endangered, and information on their ecology and behaviour is desperate needed if conservation plans are to be effective.