Based on 3,317 research-grade iNaturalist observations in Illinois, American Tree Sparrow is most often recorded in January; in Illinois it behaves like a winter visitor. It ranks #40 among birds recorded in the state in our data.
Spizelloides arborea
American Tree Sparrow in Illinois 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 Illinois in January
Dark-eyed Junco
Northern Cardinal
Canada Goose
American Herring Gull
Common Goldeneye
Red-tailed Hawk
Downy Woodpecker
House Sparrow
Places to look in Illinois
State ParkCahokia
Botanical GardenMorton Arboretum
National ForestShawnee National Forest
Botanical GardenChicago Botanic Garden
Botanical GardenLadd Arboretum
State ParkStarved Rock State Park
FAQ
When does American Tree Sparrow appear in Illinois?
Mainly November–March, with the most records in January.
How common is American Tree Sparrow in Illinois?
It ranks #40 by number of iNaturalist observations among birds in Illinois (3,317 records in our sample).