The Cynomolgus monkey, also known as the long-tailed macaque, is a species of primate found primarily in Southeast Asia. They are medium-sized monkeys, typically weighing between 5 to 10 pounds, with a long tail that can be as long as their body. These monkeys are known for their adaptability to various habitats, including forests, mangroves, and urban areas. Cynomolgus monkeys are social animals, living in troops that can consist of several individuals. They are omnivorous, feeding on fruits, leaves, insects, and small animals. Due to their close genetic relationship to humans, they are often used in scientific research and medical studies, making them important in the field of biomedical research.