If you find this page useful please consider making a donation to help us continue to care for needy monkeys. Classifications are disputed. Genus used to contain 1 species and 10 subspecies. In 1983 all were elevated to separate species, based on genetic evidence. Only two forms are readily recognizable - gray and red necked.
Difference is mainly in the undercoat and neck color.
They are normally 11-16 inches long in body, with males slightly longer, and weigh around 2 pounds. Red-necked owl monkeys are a bit heavier than gray. Found in forest habitats. Fruit accounts for most of their diet, but they will also eat leaves, flowers, sap, and animal prey. They are arboreal, with different species preferring different levels and types of forest.