Erethizon dorsatum

Porcupines are equipped with hairless soles and long claws that allow them to climb easily. Depending on the region, porcupine may spend most of their winter up in the branches of trees, gnawing on bark, or in a den.

   A porcupine may have up to 30,000 quills. When confronted by a predator, porcupines will turn so their tail is facing the attacker. They will then swing their bristly, quill-laden tail at their pursuer. Quills that brush against the skin stick in fast and, thanks to the tiny barbs covering each quill, will gradually work deeper into the afflicted animal. Despite the misconception, porcupines are not able to shoot their quills.