Eurasian Tree Sparrows in Illinois
When Eurasian tree sparrows are present in Illinois, when they nest, which native Illinois plants feed them, and how to host them in a USDA 5a–7b yard.
- Status in Illinois
- Year-round resident
- Nesting window
- April–August
- Broods
- 2–3 per season
- Hardiness zones
- USDA 5a–7b
- Nest box
- 1 1/4 in hole, 4 × 4 in floor, 6–15 ft
When to expect Eurasian tree sparrows in Illinois
Eurasian Tree Sparrows live in Illinois all year. Cold, windy winters in the north; the southern tip is milder and hosts more wintering species. That makes the cold months the time your yard matters most to them.
Humid continental, grading from the Lake Michigan shore and prairie north to the forested Shawnee Hills in the south.
Nesting in Illinois
Across Illinois, Eurasian tree sparrows typically nest from April–August. Plan around that window: March for setup, August for clean-out.
Hot, humid summers; much of the state is farmland, so backyard native plantings matter.
- Have boxes cleaned and mounted before March — Eurasian tree sparrows begin prospecting ahead of egg-laying.
- Use a 1 1/4 in entrance on a 4 × 4 in floor, mounted 6–15 ft.
- Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
- Clean out old nests after each brood and again after August.
Native Illinois plants that attract Eurasian tree sparrows
Of the regional native plants we track for Illinois, these 8 provide food or cover Eurasian tree sparrows use:
Tubular flowers for hummingbirds and seed heads for finches.
Leave seed heads up through winter for goldfinches.
Prolific seed heads for finches and sparrows.
Annual native sunflower — the original feeder seed.
Late nectar for insects and fall seed for sparrows.
Native bunchgrass; winter seed and ground cover for sparrows and juncos.
Insect-rich in fall and seed in winter.
Hosts hundreds of caterpillar species; spring flowers draw early insects.
Feeding Eurasian tree sparrows through the Illinois year
- Top foods: Millet, Cracked corn.
- In Illinois's winter: Cold, windy winters in the north; the southern tip is milder and hosts more wintering species.
Full diet breakdown for Eurasian tree sparrows · Best feeder for Eurasian tree sparrows
Frequently asked
Are Eurasian tree sparrows in Illinois year-round?
Yes. Eurasian Tree Sparrows are year-round residents in Illinois.
When do Eurasian tree sparrows nest in Illinois?
Nesting in Illinois typically runs April–August, with 2–3 per season. Clutches are 4–6 eggs, incubated for 12–13 days.
What native plants attract Eurasian tree sparrows in Illinois?
Wild bergamot, Purple coneflower, Black-eyed Susan, Common sunflower, New England aster, Little bluestem, Tall goldenrod, Sugar maple are native plants in Illinois that provide food or cover for Eurasian tree sparrows.
What size birdhouse hole do Eurasian tree sparrows need?
1 1/4 in, with a floor of 4 × 4 in mounted 6–15 ft.
Eurasian Tree Sparrows in other regions
Other backyard birds in Illinois
Sources
- Eurasian Tree Sparrow — All About Birds, Cornell Lab of Ornithology
- Eurasian Tree Sparrow life history — Cornell Lab of Ornithology
- Eurasian Tree Sparrow — Audubon Guide to North American Birds
- NestWatch nest box plans and species requirements — Cornell Lab
- eBird region overview and bar charts — Illinois
- USDA Plant Hardiness Zone Map (2023)
- Audubon Native Plants Database
Timing reflects typical patterns for the region as a whole; local dates vary with elevation and year. Check the linked eBird bar charts for your county.