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

Ruby-throated Hummingbird Population Trend in Illinois

All statesGeneralists

Ruby-throated Hummingbird in Illinois has surged: up 14× on the route-weighted index since 1968.

14×Since 1968
95Routes In State
58Years

Notable Ruby-throated Hummingbird Trends in Illinois

long arc increasecomputed index

Ruby-throated Hummingbird has surged in Illinois: up 14× on the route-weighted index since 1968.

Ruby-throated Hummingbird Population Forecast in Illinois

If the recent trend holds, Ruby-throated Hummingbird in Illinois is projected to stay roughly flat through 2029, near 0.88 (95% range 0.57–1.2). A 5-year backtest shows a typical error of ±15.2%, with 100% of held-out values landing inside the 95% band.

-3%Change by 2029
0.88Projected 2029 index
0.57–1.295% range
±15.2%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
20250.830.521.1
20260.840.541.1
20270.850.551.2
20280.870.561.2
20290.880.571.2

Ruby-throated Hummingbird Survey Routes in Illinois

Routes recording Ruby-throated Hummingbird in Illinois.
Belleview1020241966
Royalton820242001
Pulaski720241970
Belknap620241970
Mt Vernon520221971
Cave In Rock520241993
Marshall520242001
Beaverdam Lk320221970
Newark220212001
Gulfport220242002
Milford219891989
Athensville220161971
Bradbury220241971
St Morgan220221968
Olney220241969
Bremen220241970
Robinson220231972
Caledonia220231993
Sherrard220091995
Camp Point220241996
Eldred220211994
Nilwood220232008
York220221993
Darmstadt220221993
Sandusky220231993

Ruby-throated Hummingbird Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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