the north american porcupine (erethizon dorsatum).

north american porcupine erethizon dorsatum america animal captive climber critter cute cute porcupine dangerous defense dorsatum furry grass herbivore mammal nature north north-american-porcupine outdoor isolated quill quills porcupine-quills porcupines rodent sharp sharp spines slow spiny tree urson vegetarian wild wild wildlife zoo zoo animals