The porcupine is a mammal that belongs to the family of rodents. It is characterized by its spiny quills that cover its body, which serve as a defense mechanism against predators. The porcupine is primarily nocturnal and feeds on a variety of vegetation, including leaves, bark, and stems. It is found in various habitats, including forests, deserts, and grasslands, and is distributed throughout the world, with the exception of Australia and Antarctica. The porcupine plays an important role in its ecosystem by controlling vegetation growth and providing a food source for predators.