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

Orchard Oriole Population Trend in Illinois

All statesGeneralists

Orchard Oriole in Illinois has surged: up 86% on the route-weighted index since 1968.

+86%Since 1968
97Routes In State
58Years

Notable Orchard Oriole Trends in Illinois

long arc increasecomputed index

Orchard Oriole has surged in Illinois: up 86% on the route-weighted index since 1968.

Orchard Oriole Population Forecast in Illinois

If the recent trend holds, Orchard Oriole in Illinois is projected to rise about 15% by 2029 — from 1.0 in 2024 to a central estimate of 1.2 (95% range 0.54–1.8). A 5-year backtest shows a typical error of ±38%, with 100% of held-out values landing inside the 95% band.

+15%Change by 2029
1.2Projected 2029 index
0.54–1.895% range
±38%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
20251.20.531.8
20261.20.531.8
20271.20.531.8
20281.20.541.8
20291.20.541.8

Orchard Oriole Survey Routes in Illinois

Routes recording Orchard Oriole in Illinois.
Belleview1320241966
Alden520232019
Eubanks520242002
Jamestown420221988
Beaverdam Lk420231970
Robinson420231970
Darmstadt420232010
Cave In Rock420241993
Clayton420242008
Cherry Val320011979
Atkinson320241995
Putnam320241973
Buda320211995
Mackinaw320221986
Bluff Spgs320241970
Delwood320241970
Troy Grove320232011
Guilford220231977
Compton219901990
Sherburnvill220191970
Stillwell220241977
Melrose219861973
Janesville220241972
Bradbury220241970
Martinsville220181973

Orchard Oriole Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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