The Formosan macaque, also known as the Taiwan macaque, is a species of monkey native to the island of Taiwan. These primates are characterized by their long tails, social behavior, and adaptability to various habitats, including forests and urban areas. They typically have a brownish or grayish coat and are known for their expressive faces. Formosan macaques are highly social animals, living in troops that can range from a few individuals to over a hundred. Their diet mainly consists of fruits, leaves, and insects, making them omnivorous. As a species, they play a crucial role in their ecosystem by aiding in seed dispersal and maintaining forest health.