They have simple digestive systems in comparison to primates that have a diet consisting primarily of leaves and bulky material. Like all Old World monkeys, monas do not have prehensile tails, meaning that they grasp objects with their tails. Life Span Can live up to 26 years in captivity. Figures in the wild are not available. Sexual Maturity Sexually mature at 4-5 years of age.
Most pregnancies result in a single birth, but twins are occasionally born.
Births usually occur at two-year intervals and take place at night in the tree in which the mother sleeps.