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

Baltimore Oriole Population Trend in Illinois

All statesGeneralists

Baltimore Oriole in Illinois has held roughly steady: down 5% on the route-weighted index since 1968.

-5%Since 1968
105Routes In State
58Years

Notable Baltimore Oriole Trends in Illinois

No notable trend signals for Baltimore Oriole in Illinois. See the full index history below.

Baltimore Oriole Population Forecast in Illinois

If the recent trend holds, Baltimore Oriole in Illinois is projected to rise about 20% by 2029 — from 2.2 in 2024 to a central estimate of 2.6 (95% range 1.3–3.9). A 5-year backtest shows a typical error of ±37.7%, with 100% of held-out values landing inside the 95% band.

+20%Change by 2029
2.6Projected 2029 index
1.3–3.995% range
±37.7%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
20252.61.33.9
20262.61.33.9
20272.61.33.9
20282.61.33.9
20292.61.33.9

Baltimore Oriole Survey Routes in Illinois

Routes recording Baltimore Oriole in Illinois.
Birds1520241977
Terre Haute1320241966
Camp Point1220231993
Marshall1220242001
Lake Galena920212001
Lake Summerset920222001
Belleview820241966
New Lenox720191966
Mill Creek620241966
Union620172001
Chandlervill520241971
Bartonville520241974
Caledonia520241993
York520241994
Payson520242000
Eubanks520242001
Guilford420231967
Holcomb420241977
Itasca420241973
Wayne420241966
Monica420171973
Deer Creek420241967
Humboldt420211972
Mt Vernon420141972
Belknap420221971

Baltimore Oriole Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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