Based on 1,049 research-grade iNaturalist observations in New Hampshire, North American Porcupine is most often recorded in May; in New Hampshire it behaves like a summer visitor / breeder. It ranks #7 among mammals recorded in the state in our data.
Erethizon dorsatum
North American Porcupine in New Hampshire by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in New Hampshire in May
White-tailed Deer
Eastern Chipmunk
American Beaver
American Black Bear
Moose
Eastern Gray Squirrel
American Red Squirrel
Groundhog
Places to look in New Hampshire
National ForestWhite Mountain National Forest
State ParkFranconia Notch State Park
State ParkOdiorne Point State Park
State ParkMount Washington State Park
State ParkRhododendron State Park
State ParkPawtuckaway State Park
FAQ
When does North American Porcupine appear in New Hampshire?
Mainly April–October, with the most records in May.
How common is North American Porcupine in New Hampshire?
It ranks #7 by number of iNaturalist observations among mammals in New Hampshire (1,049 records in our sample).