Humboldt's Night (Owl) Monkey

The three-striped night monkey, also known as the northern night monkey or northern owl monkey, is a captivating species native to Venezuela and north-central Brazil. Until 1983, all owl monkeys were classified under the name Aotus trivirgatus and were commonly referred to as douroucoulis. However, there is some disagreement about using the name douroucouli specifically for the three-striped night monkey.

These monkeys thrive in woodlands, including lush rainforests. They are primarily black with striking white facial markings and large eyes, making them easily recognizable. They are most active on moonlit nights, enjoying a diverse diet that includes fruits, nuts, leaves, insects, small invertebrates, and even birds' eggs. Adult three-striped night monkeys typically weigh around 1 kg, with body lengths ranging from 27 to 48 cm, and tails of similar length.

One of the most fascinating aspects of their behavior is their strong pair bonds. These monkeys form lifelong partnerships, staying together until one partner dies. They live in close-knit family groups, with young monkeys remaining with the family until they reach sexual maturity at about 3 to 4 years old. Typically, only one baby is born after a gestation period of just over four months.