Quick answer
Key facts about north american porcupine — size, diet, habitat, and conservation in one place.
Quill defence
Quills are modified hairs with barbed tips that embed and migrate in attackers — painful and difficult to remove. Porcupines cannot shoot quills; predators must contact the raised tail. Fishers are skilled porcupine hunters, attacking the unquilled face.
Arboreal herbivore
Strong claws and rough soles let porcupines spend days in trees eating inner bark, especially in winter. Their salt craving draws them to road salt, tool handles, and plywood glue — sometimes bringing them near human structures.
Slow reproduction
Females bear a single precocial young after seven months gestation — long for a rodent. Baby porcupines ('porcupettes') have soft quills that harden within hours. Adults are solitary except during breeding.
Forest role and conflict
Porcupines girdle trees, sometimes damaging timber operations, but also create habitat for other species through bark stripping. Least Concern globally, they remain common across Canada and the western United States.