Chiropotes

Chiropotes, commonly called the bearded sakis or cuxius, is a genus of New World monkey in the family Pitheciidae, order Primates, comprising five IUCN-recognized species that inhabit the eastern and central Amazon across southern Venezuela, Guyana, Suriname, French Guiana, and northern and central Brazil, with each species occupying its own territory separated by major rivers. They are marked by a pronounced beard of hair running from the jaw down the throat to the chest, especially prominent in males, and have long hairy tails used for balance rather than grasping; they measure 32 to 51 centimeters in length and weigh 2 to 4 kilograms. Bearded sakis are diurnal, arboreal and quadrupedal, live in groups of roughly 18 to 30 individuals that communicate with bird-like twitters and high whistles, and sometimes associate with capuchins and squirrel monkeys. Females bear a single offspring annually after a five-month gestation, with young reaching independence around three months and maturity at four years, and an average lifespan of 15 years. Two of the five species are classified as vulnerable and Chiropotes satanas is classified as endangered.