By Misi Stine, Environmental Educator and member of the MN Herpetological Society
The North American Porcupine is the second largest rodent on this continent (the largest being the American beaver). They weigh between 15-35 lbs., are 2-4 feet in length, have an average lifespan in the wild of 18 years, and make a wide variety of vocalizations, some of which can be heard for long distances (click here to listen to a sample). They are found in colors from blond to black and have large teeth with reddish-orange colored incisors. The color comes from iron in the tooth enamel that strengthens their teeth, allowing them to chew through lots of fibrous materials.