Pennsylvania’s 1,148 porcupine records belong to the forested highlands. Centre, Huntingdon, and Monroe counties lead the tally, and the sightings string along the big public woods: Rothrock, Moshannon, and Forbes state forests, Allegheny National Forest, and the ridges crossed by the Appalachian National Scenic Trail.
A bark-eater built for winter
Porcupines make their living in trees. Summer brings leaves, buds, and green shoots, but the defining season is winter, when the animal climbs into hemlocks and hardwoods and feeds on inner bark for weeks at a stretch. It moves slowly because it can afford to; a coat of some thirty thousand quills makes nearly every predator reconsider. It also craves salt, which draws it to roadsides, sheds, and tool handles left out overnight.
Records crest at leaf-out
Pennsylvania counts peak from April through June, when fresh growth pulls porcupines into the canopy and females give birth, each to a single well-developed porcupette whose soft quills harden within hours. The animals stay active all winter, but they den in rock ledges and hollow trees through the coldest stretches, and winter records thin to a trickle.
Status in Pennsylvania
No NatureServe state rank is on file for the porcupine in Pennsylvania. The species is native to its mapped range here, USGS NAS does not list it as nonindigenous, and it carries no special listing under the state’s conservation framework, with the IUCN ranking it Least Concern globally. Once mostly a northern animal, it has been working south along Pennsylvania’s forested ridges for decades and continues to turn up in new country.
Full species profile
