The Erethizon dorsatum, commonly known as the porcupine, is a large rodent native to North America. It is characterized by its coat of sharp quills, which serve as a defense mechanism against predators. Porcupines are primarily nocturnal and are herbivorous, feeding on leaves, bark, and fruits. Porcupines have a stocky body, short legs, and a distinctive, spiny appearance. They are excellent climbers and often inhabit forests, woodlands, and rocky areas. Their quills can detach easily when threatened, embedding in the skin of attackers, making them a formidable opponent in the wild.