Based on 2,827 research-grade iNaturalist observations in Colorado, Swainson's Hawk is most often recorded in August; in Colorado it behaves like a summer visitor / breeder. It ranks #27 among birds recorded in the state in our data.
Buteo swainsoni
Swainson's Hawk 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 August
Black-billed Magpie
Broad-tailed Hummingbird
Red-tailed Hawk
Mallard
Steller's Jay
Wild Turkey
Dusky Grouse
Northern Flicker
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 Swainson's Hawk appear in Colorado?
Mainly April–September, with the most records in August.
How common is Swainson's Hawk in Colorado?
It ranks #27 by number of iNaturalist observations among birds in Colorado (2,827 records in our sample).