BirdAnalyst
Species · Illinois · BBS 2025 Release · 1966–2024

Hooded Warbler Population Trend in Illinois

All statesForest birds

Hooded Warbler in Illinois has increased: up 34% on the route-weighted index since 1981.

+34%Since 1981
9Routes In State
31Years

Notable Hooded Warbler Trends in Illinois

No notable trend signals for Hooded Warbler in Illinois. See the full index history below.

Hooded Warbler Population Forecast in Illinois

If the recent trend holds, Hooded Warbler in Illinois is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±44%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.03Projected 2029 index
0.00–0.0695% range
±44%Backtest error
19712029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.030.000.06
20260.030.000.06
20270.030.000.06
20280.030.000.06
20290.030.000.06

Hooded Warbler Survey Routes in Illinois

Routes recording Hooded Warbler in Illinois.
Sandusky220222000
Dailey120052005
Concord120111981
Itasca119921992
Sheffield120052005
Wayne120212021
Cave In Rock120241995
Jamestown119711971
Delwood120231980

Hooded Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaindianakentuckylouisianamarylandmassachusettsmichiganmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.