Based on 3,876 research-grade iNaturalist observations in Maryland, Green Heron is most often recorded in August; in Maryland it behaves like a summer visitor / breeder. It ranks #31 among birds recorded in the state in our data.
Butorides virescens
Green Heron 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 August
Great Blue Heron
Ruby-throated Hummingbird
Osprey
American Goldfinch
Laughing Gull
Northern Cardinal
Mallard
Great Egret
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 Green Heron appear in Maryland?
Mainly April–September, with the most records in August.
How common is Green Heron in Maryland?
It ranks #31 by number of iNaturalist observations among birds in Maryland (3,876 records in our sample).