Based on 3,117 research-grade iNaturalist observations in Maryland, Brown-headed Cowbird is most often recorded in April; in Maryland it behaves like a seasonal. It ranks #40 among birds recorded in the state in our data.
Molothrus ater
Brown-headed Cowbird 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 April
American Robin
Canada Goose
Northern Cardinal
Red-winged Blackbird
Mallard
Osprey
White-throated Sparrow
Mourning Dove
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 Brown-headed Cowbird appear in Maryland?
Mainly March–June, with the most records in April.
How common is Brown-headed Cowbird in Maryland?
It ranks #40 by number of iNaturalist observations among birds in Maryland (3,117 records in our sample).