The long-tailed macaque, also known as the crab-eating macaque, is a species of primate found primarily in Southeast Asia. They inhabit a variety of environments, including forests, mangroves, and urban areas. These monkeys are easily recognizable by their long tails, which can be longer than their bodies, and their social behavior, often seen in troops. Long-tailed macaques are omnivorous, feeding on fruits, seeds, and small animals. They are known for their adaptability and intelligence, often using tools to access food. Their social structure is complex, with strong hierarchies and interactions among group members, making them a fascinating subject of study in primatology.