Humboldt’s Night Monkey

• Common Names: Humboldt’s Night Monkey, Northern Owl Monkey, and Northern Night Monkey
• Taxonomy Classification Year: 1812
• Monkey Size: 24 to 47 cm (9.45 to 18.5 in)
• Skin Color(s): Black
• Habitat: Forest, rainforest
• Diet: Omnivorous
• Native Countries: Venezuela, Brazil

The three-striped night monkey^[1] (Aotus trivirgatus), also known as the northern owl monkey, Humboldt’s Night Monkey, or northern night monkey, is one of several currently recognized species of owl monkeys.

• Male and female species are similar in size, with a body length of 24-47 cm. However, the length of the tail varies from 22 to 42 cm.
• Coat colors range from gray, grizzled brown, reddish, and whitish to the orange underbelly.
• Coat color varies from one geographic location to another. For this reason, in part, the three-striped night monkey is often classified by different researchers into many different species or subspecies.
• Humboldt’s night monkeys also have large orange/brown eyes. Distinctive facial features include a triangular black patch between the eyes and black stripes down the sides framing his white face.

• Three-striped night monkey is the only nocturnal primate in the Neotropics.
• These primates have the largest olfactory bulbs and accessory olfactory bulbs of any New World monkey, possibly due to their dependence on scents during nocturnal activities.
• The three-striped night monkey forms pair bonds that are only broken with the death of one of the members.
• These New-World Monkeys live in family groups, with the immature young staying with their parents until they reach sexual maturity at three or four years old.
• They are territorial animals with a home range of about 9 hectares. They defend these territories, and aggression ensues when neighboring groups meet at the borders of the territories.