PBS
Pbs Nature Critter Guide: Porcupine
This PBS Critter Guide site tells you how many quills the average porcupine has as well as other facts about this creature's natural history in text and pictures.
PBS
Nh Pbs: Nature Works: North American Porcupine
Check out this educational resource to find out about the North American Porcupine. This site features information ranging from characteristics, life cycle, behavior, range, habitat, and diet.
Smithsonian Institution
National Museum of Natural History: American Mammals: North American Porcupine
North American Porcupines are large, slow-moving, tree-climbing rodents, protected from predators by their formidable quills. In winter, they eat the bark, phloem, and cambium of trees, particularly conifers. Learn more about the...