Leontocebus Oedipus, also known as the cotton-top tamarin, is a small New World monkey found in Colombia. Synonyms for this species include Saguinus oedipus, Leontocebus oedipus oedipus, and Eutrixus oedipus. These synonyms have been used over time by various taxonomists to describe the same species, but the name Leontocebus oedipus is currently recognized as the valid scientific name. The cotton-top tamarin is known for its distinctive white crest of hair on its head and is considered endangered due to habitat loss and the pet trade. Conservation efforts are being made to protect this unique and important species.