The family Callitrichidae includes small primates known as marmosets and tamarins. These adorable creatures are native to the forests of Central and South America. They are characterized by their small size, often weighing less than a pound, and their lively, social behavior. Marmosets and tamarins live in family groups, which helps them find food and protect each other from predators. One unique feature of Callitrichidae is their reproductive strategy. Many species give birth to twins, which is quite rare among primates. The entire family helps care for the young, showcasing their strong social bonds. These fascinating animals play an important role in their ecosystems by dispersing seeds and maintaining forest health.