Sumatra Monkey Wildlife nature wild Outdoor jungle profile The Pagai Island Macaque (Macaca pagensis), also known as the Pagai M
The Pagai Island Macaque (Macaca pagensis), also known as the Pagai Macaque or Bokkoi, is an Old World monkey that is endemic to the Mentawai Islands off the west coast of Sumatra. It is listed as critically endangered on the IUCN Red List due to its ever-shrinking habitat. It formerly included the overall darker M. siberu as a subspecies, but this arrangement is polyphyletic, leading to the two being classified as separate species. Both were formerly considered subspecies of M. nemestrina. Pagai Island Macaque males are generally larger than females. The males' body length ranges from 45-55 cm and females' body length is around 40–45 cm. Tail length is 13-16 cm for males and 10–13 cm for females. Males are also heavier, weighing around 6–9 kg while females weigh kg. Their backs have a dark brown coloration, and chestnut to pale ochre on the sides of the neck, the front of the shoulders and the underside of this species. Legs are brown and their arms, reddish brown. The face of a Mentawai Macaques is furless and black-skinned with brown eyes. They have cheek pouches to carry food while foraging. The macaques' natural habitat is rainforest, but can also be found in riverine and coastal swamp-forests. It lives high above the forest floor in the canopy, forages between 24 and 36 meters and may sleep as high as 45 meters. The primary diet of the species is figs. They may split up into splinter groups to forage for food and to sleep. They will eat alongside groups of Mentawai Langurs. Macaca pagensis groups consist of around 5-25 indiviuals. There is typically a single male per group, along with adult females and their offspring. The male decides where to go and communicates this to the rest of the group with high-pitched cries. Roaming, solitary Pagai Island Macaques may challenge the dominant male for his position leading to aggressive fights. The natural predators of the species are the Crested Serpent Eagle and the Reticulated Python.
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