Tropical Monkeys are a type of primate found in the tropical regions of Central and South America. Marmosets are one of the most common types of Tropical Monkeys, and they are characterized by their small size and long tails. They are omnivorous, meaning they eat both plants and animals, and they live in groups of up to 20 individuals. Marmosets are also known for their loud calls, which can be heard from up to 1 kilometer away.