Stock photography, photos: American porcupine Erethizon dorsa Stock photos of American porcupine Erethizon dorsatum Photograph: © John T. Fowler Click for a larger image and more information Keywords associated with this stock photo: american, porcupine, mammal, animal, erethizon, dorsatum, quills, horizontal, tree, vegetarian, pest, nuisance, closeup, close up, vermin, color, colour