Based on 2,531 research-grade iNaturalist observations in Indiana, Red-winged Blackbird is most often recorded in April; in Indiana it behaves like a seasonal. It ranks #9 among birds recorded in the state in our data.
Agelaius phoeniceus
Red-winged Blackbird in Indiana 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 Indiana in April

American Robin
Canada Goose

Northern Cardinal

Mallard

House Sparrow

Brown-headed Cowbird

Mourning Dove
Eastern Bluebird
Places to look in Indiana
Turkey Run State Park
Brown County State Park
Prophetstown State Park
National ForestHoosier National Forest
Mounds State Park
Falls of the Ohio State Park
FAQ
When does Red-winged Blackbird appear in Indiana?
Mainly March–June, with the most records in April.
How common is Red-winged Blackbird in Indiana?
It ranks #9 by number of iNaturalist observations among birds in Indiana (2,531 records in our sample).