The North American porcupine, scientifically known as Erethizon dorsatum, is a large rodent found primarily in forests across Canada and the United States. It is easily recognized by its coat of sharp quills, which serve as a defense mechanism against predators. These quills are modified hairs coated with keratin and can detach easily when a predator comes into contact with them. North American porcupines are primarily herbivorous, feeding on leaves, bark, and fruits. They are nocturnal and spend much of their time climbing trees, where they can find food and avoid ground-based threats. Their unique adaptations help them thrive in various habitats, from woodlands to mountainous regions.