Based on 6,679 research-grade iNaturalist observations in Colorado, Red-winged Blackbird is most often recorded in May; in Colorado it behaves like a seasonal. It ranks #6 among birds recorded in the state in our data.
Agelaius phoeniceus
Red-winged Blackbird in Colorado 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 Colorado in May
Canada Goose
Mallard
American Robin
Black-billed Magpie
Bullock's Oriole
Spotted Towhee
Great Blue Heron
Western Tanager
Places to look in Colorado
National ForestWhite River National Forest
Botanical GardenDenver Botanic Gardens
National ForestRio Grande National Forest
National ForestSan Juan National Forest
State ParkRoxborough State Park
State ParkMancos State Park
FAQ
When does Red-winged Blackbird appear in Colorado?
Mainly March–July, with the most records in May.
How common is Red-winged Blackbird in Colorado?
It ranks #6 by number of iNaturalist observations among birds in Colorado (6,679 records in our sample).