Spix's Night Monkey

Spix's Night Monkey (Aotus vociferans) is found in Brazil, Colombia, Ecuador, and Peru.
The Spix's Night Monkey is a small-bodied monkey species usually having a mass of around one kilogram. This type of monkey can leap farther than most due to it having longer arms than legs.
The social behavior of the Aotus vociferans is group-based. These groups usually consist of breeding pairs and their offspring. This species has a monogamous mating system. After the offspring are born, the father becomes the main caretaker, only giving up the offspring for them to suckle. This species moves through the forest by swinging between horizontal branches and uses all four limbs to grab branches. They may also leap from tree to tree.