Erethizontidae, commonly known as the New World porcupines, is a family of rodents found primarily in the Americas. They are characterized by their spiny quills, which serve as a defense mechanism against predators. These nocturnal animals are mostly arboreal, spending much of their time in trees, and they have a diet that includes leaves, fruits, and bark. There are about 15 species within the Erethizontidae family, with the most well-known being the North American porcupine and the Brazilian porcupine. They have strong, curved claws that help them climb and navigate their forest habitats. Despite their prickly appearance, they are generally solitary and non-aggressive animals.