The American porcupines (Erethizontidae) are a family of mammals in the order rodents. They live in forest areas and are well adapted to an arboreal lifestyle. Some species live in trees, in hollows; others settle on the ground, at the roots, in crevices of rocks.
All tree porcupines are excellent climbers. Like ordinary porcupines, they are active mainly at night, and sleep at an altitude of 6-10 m during the day.