Echimys is a genus of spiny rats found primarily in the tropical forests of South America. These rodents are known for their distinctive spiny fur, which provides protection from predators. They are primarily nocturnal and are adapted to a variety of habitats, including lowland rainforests and mountainous regions. Echimys species are generally medium-sized and have a diet that consists mainly of fruits, seeds, and other plant materials. They play an important role in their ecosystem by aiding in seed dispersal. Their unique adaptations and behaviors make them an interesting subject of study in the field of mammalogy.