The coypu, also known as nutria, is a large semi-aquatic rodent native to South America. It has a robust body, webbed feet, and a long, round tail. Coypus typically inhabit wetlands, rivers, and marshes, where they feed on aquatic plants and grasses. Coypus are known for their thick, waterproof fur, which can vary in color from brown to gray. They are social animals, often found in groups, and are most active during the evening and night. Due to their rapid reproduction and feeding habits, coypus can become invasive in some regions outside their native habitat.