Based on 1,650 research-grade iNaturalist observations in Maine, North American Porcupine is most often recorded in July; in Maine it behaves like a summer visitor / breeder. It ranks #4 among mammals recorded in the state in our data.
Erethizon dorsatum
North American Porcupine in Maine 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 Maine in July
American Red Squirrel
White-tailed Deer
Eastern Chipmunk
Moose
Harbor Seal
Groundhog
Snowshoe Hare
Grey Seal
Places to look in Maine
State ParkBaxter State Park
State ParkFort Halifax
State ParkTwo Lights State Park
State ParkQuoddy Head State Park
State ParkFort Point State Park
State ParkPopham Beach State Park
FAQ
When does North American Porcupine appear in Maine?
Mainly April–November, with the most records in July.
How common is North American Porcupine in Maine?
It ranks #4 by number of iNaturalist observations among mammals in Maine (1,650 records in our sample).