Pagai Island macaque

The Pagai Island macaque (Macaca pagensis), also called the Pagai macaque or Bokkoi, is an Old World monkey found only in the Mentawai Islands, about 150 kilometres off the west coast of Sumatra, where it lives on North Pagai, South Pagai and Sipura. It once included the darker Siberut macaque as a subspecies, but the two are now treated as separate species, and both were formerly considered subspecies of the southern pig-tailed macaque. Males are larger than females, with a body length of 45 to 55 centimetres and a weight of about 6 to 9 kilograms, against 40 to 45 centimetres and 4.5 to 6 kilograms for females. The back is dark brown, the neck sides, shoulder fronts and underparts are chestnut to pale ochre, the arms are reddish brown, and the bare face is black with brown eyes. It lives high in the canopy of rainforest, riverine forest and coastal swamp forest, feeds mainly on figs, and lives in groups of about 5 to 25 with a single male. Forest clearance for cash crops and oil palm and commercial logging have shrunk its habitat, and the IUCN lists the species as Critically Endangered.