Based on 6,197 research-grade iNaturalist observations in Pennsylvania, Eastern Chipmunk is most often recorded in May; in Pennsylvania it behaves like a summer visitor / breeder. It ranks #4 among mammals recorded in the state in our data.
Tamias striatus
Eastern Chipmunk in Pennsylvania 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 Pennsylvania in May
White-tailed Deer
Eastern Cottontail
Eastern Gray Squirrel
Groundhog
Red Fox
Common Raccoon
American Beaver
American Red Squirrel
Places to look in Pennsylvania
National ForestAllegheny National Forest
State ParkPresque Isle State Park
Botanical GardenJenkins Arboretum
State ParkCherry Springs State Park
State ParkColton Point State Park
State ParkLeonard Harrison State Park
FAQ
When does Eastern Chipmunk appear in Pennsylvania?
Mainly April–July, with the most records in May.
How common is Eastern Chipmunk in Pennsylvania?
It ranks #4 by number of iNaturalist observations among mammals in Pennsylvania (6,197 records in our sample).