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

Pine Warbler Population Trend in Illinois

All statesForest birds

Pine Warbler in Illinois has edged down: down 19% on the route-weighted index since 1975.

-19%Since 1975
8Routes In State
46Years

Notable Pine Warbler Trends in Illinois

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

Pine Warbler Population Forecast in Illinois

If the recent trend holds, Pine Warbler in Illinois is projected to stay roughly flat through 2029, near 0.05 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±63.2%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.05Projected 2029 index
0.00–0.1395% range
±63.2%Backtest error
19732029
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
20250.050.000.13
20260.050.000.13
20270.050.000.13
20280.050.000.13
20290.050.000.13

Pine Warbler Survey Routes in Illinois

Routes recording Pine Warbler in Illinois.
Cave In Rock320241993
Delwood320231973
Bremen220152013
Karnak120022002
Union120172017
Sandusky119971994
Brnt Prairie119971997
Beaverdam Lk120221975

Pine Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaindianakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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