Based on 1,890 research-grade iNaturalist observations in Maryland, Gray Hairstreak is most often recorded in September; in Maryland it behaves like a seasonal. It ranks #21 among butterflies recorded in the state in our data.
Strymon melinus
Gray Hairstreak 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 September
Huron Skipper
Monarch
Eastern Tiger Swallowtail
Common Buckeye
Pearl Crescent
Variegated Fritillary
Eastern Tailed-Blue
Black Swallowtail
Places to look in Maryland
State ParkWashington Monument State Park
State ParkPatapsco Valley State Park
State ParkSeneca Creek State Park
State ParkCalvert Cliffs State Park
State ParkSusquehanna State Park
State ParkGambrill State Park
FAQ
When does Gray Hairstreak appear in Maryland?
Mainly July–September, with the most records in September.
How common is Gray Hairstreak in Maryland?
It ranks #21 by number of iNaturalist observations among butterflies in Maryland (1,890 records in our sample).