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

Scarlet Tanager Population Trend in Illinois

All statesGeneralists

Scarlet Tanager in Illinois has surged: up 98% on the route-weighted index since 1968.

+98%Since 1968
87Routes In State
58Years

Notable Scarlet Tanager Trends in Illinois

long arc increasecomputed index

Scarlet Tanager has surged in Illinois: up 98% on the route-weighted index since 1968.

Scarlet Tanager Population Forecast in Illinois

If the recent trend holds, Scarlet Tanager in Illinois is projected to rise about 74% by 2029 — from 0.23 in 2024 to a central estimate of 0.40 (95% range 0.23–0.56). A 5-year backtest shows a typical error of ±36.2%, with 80% of held-out values landing inside the 95% band.

+74%Change by 2029
0.40Projected 2029 index
0.23–0.5695% range
±36.2%Backtest error
19662029
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
20250.380.220.54
20260.390.220.55
20270.390.230.55
20280.390.230.56
20290.400.230.56

Scarlet Tanager Survey Routes in Illinois

Routes recording Scarlet Tanager in Illinois.
Barrington319951993
Birds320221980
Guilford220221969
Putnam220041981
Dailey220211988
Melrose219951994
Pawnee220181968
Janesville220231973
Bremen220241969
Delwood220241970
Brownville220191993
Sandusky220231993
Cave In Rock220241993
Royalton220192001
Mill Creek120181966
Holcomb119821982
Cherry Val120021984
Itasca119971989
Atkinson120211995
Geneseo120001987
Sheffield120191971
Buda120191997
Compton119841968
Streator119811981
Wayne120231981

Scarlet Tanager Population Trend in Other States

alabamaarkansasconnecticutdelawaregeorgiaindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseevermontvirginiawest-virginiawisconsin

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