The term 'Little Monkey of South America' refers to the Titi, a small monkey native to the tropical forests of South America. The Titi is a small, arboreal primate that lives in family groups and feeds mainly on fruits, flowers, and insects. It is known for its distinctive vocalizations and its long, bushy tail. The Titi is an important part of the local ecosystem, helping to disperse seeds and pollinate plants.