Aotus trivirgatus, commonly known as the three-striped night monkey, is a species of owl monkey found in the tropical forests of South America, particularly in countries like Brazil, Colombia, and Peru. This small primate is notable for its large eyes, which help it see well in low light, as it is primarily nocturnal. The three-striped night monkey has a distinctive coat with three light stripes running down its back. It is a social animal, often living in small family groups. Its diet mainly consists of fruits, insects, and small vertebrates, making it an important part of its ecosystem.