Night monkeys are mysterious and rarely seen primates because they are active only at night. The Peruvian night monkey (Aotus miconax), also known as the Andean night monkey, is a nocturnal New World monkey endemic to northern Peru.Adults weigh around 1 kg (2.2 lb) and measure up to 50 cm (20 in) in length. They can be found in Panama, Ecuador, Peru, Argentina, Bolivia, Columbia and Brazil. A close relative, the brown nocturnal monkey (Aotus miconax) is endemic to Peru and is distributed in the high jungle (valleys of the Maronony Huallaga rivers) up to 3,200 meters. The Peruvian night monkey (Aotus miconax), also known as the Andean night monkey, is a nocturnal New World monkey endemic to northern Peru.Adults weigh around 1 kg (2.2 lb) and measure up to 50 cm (20 in) in length. Its colour is grey to light brown with … There are around 10 different species of night monkeys that live in Central and South America. Spix’s night monkey Description. Adult Spix's night monkeys (Aotus vociferans), in Nauta Cano, Amazon River Basin, Iquitos, Peru - Acheter cette photo libre de droit et découvrir des images similaires sur Adobe Stock Spix’s night monkey, scientific name Aotus vociferans is a night monkey species from South America. Source: Guia de Identificacion de Especies de la Flora y la Fauna del Peru The Peruvian night monkey (Aotus miconax) is one of the world's least known primates, having never been studied in the wild - until now.Found only in the cloud forests of northern Peru… The night monkeys, also known as the owl monkeys or douroucoulis, are the members of the genus Aotus of New World monkeys. Night monkeys usually inhabit dense tropical rainforests, located on the high altitudes. Its colour is grey to light brown with … It’s present in Brazil, Colombia, Ecuador, and Peru. The Spix’s night monkey is a small-bodied monkey species often having a mass of around one kilogram. Night monkeys live in Central and South America, from Panama to El Chaco (Argentina).