| type | Status | Habitat |
 |
 |
 |
|
MAMMALS |
STABLE |
NORTH-AMERICA |
 North American porcupines are native to the coniferous and mixed-forest habitats of Canada, the northeastern and western regions of the United States and northern Mexico. Besides forests |
 Porcupines also eat pine needles, berries, seeds, flowers, and water plants. |
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The 300,000 quills that cover the porcupine's body are its best defense-but not the way you may think! A common myth is that porcupines can "shoot" their quills at a predator; but they can't. Here's the truth: the quills are made of keratin like your hair and fingernails. And just like your hair, old quills fall out as new ones grown in. The shed quills often get trapped in the fur around them, and when a porcupine shakes, the quills fall out. Also, the spines are loosely attached to the skin. When they come in contact with something else, they are easily detached.
Sometimes it's hard to see the quills on a North American porcupine, because they are hidden by long, soft guard hairs. But if a porcupine feels threatened, it makes the prickly parts easy to see. Muscles at the base of each spine contract and make the quill stand upright. When all the quills are erect, it makes the animal look very large and dangerous! The spiny tail can also be used like a club, lashing it back and forth. This makes the quills rattle, adding a warning sound to the animal's display.
orcupines are a type of rodent, and their incisors prove it! A porcupine uses its large two front teeth for gnawing off bites of food. The incisors continue to grow throughout the porcupine's life, and the constant gnawing keeps them worn down to the perfect size.