Based on 1,786 research-grade iNaturalist observations in Maryland, Eastern Chipmunk is most often recorded in May; in Maryland it behaves like a summer visitor / breeder. It ranks #8 among mammals recorded in the state in our data.
Tamias striatus
Eastern Chipmunk in Maryland 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 Maryland in May

White-tailed Deer

Eastern Cottontail

Eastern Gray Squirrel
Red Fox

Groundhog

Common Raccoon
American Beaver

Virginia Opossum
Places to look in Maryland
Washington Monument State Park
Patapsco Valley State Park
Seneca Creek State Park
Calvert Cliffs State Park
Susquehanna State Park
Gambrill State Park
FAQ
When does Eastern Chipmunk appear in Maryland?
Mainly April–July, with the most records in May.
How common is Eastern Chipmunk in Maryland?
It ranks #8 by number of iNaturalist observations among mammals in Maryland (1,786 records in our sample).