Rodents are small mammals that belong to the order Rodentia. They are characterized by their continuously growing front teeth, which they need to gnaw on various materials to keep them from getting too long. Common examples of rodents include mice, rats, squirrels, and guinea pigs. They can be found in almost every habitat around the world, from forests to urban areas. These animals play important roles in ecosystems, such as helping to disperse seeds and serving as food for many predators, including birds of prey and snakes. Rodents are also popular pets, with species like hamsters and gerbils being loved for their playful nature and small size.