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

House Finch Population Trend in Illinois

All statesGeneralists

House Finch in Illinois has surged: up 26× on the route-weighted index since 1989.

26×Since 1989
105Routes In State
37Years

Notable House Finch Trends in Illinois

long arc increasecomputed index

House Finch has surged in Illinois: up 26× on the route-weighted index since 1989.

House Finch Population Forecast in Illinois

If the recent trend holds, House Finch in Illinois is projected to fall about 10% by 2029 — from 4.9 in 2024 to a central estimate of 4.4 (95% range 1.1–7.7). A 5-year backtest shows a typical error of ±12.6%, with 100% of held-out values landing inside the 95% band.

-10%Change by 2029
4.4Projected 2029 index
1.1–7.795% range
±12.6%Backtest error
19872029
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
20254.31.07.6
20264.31.17.6
20274.41.17.7
20284.41.17.7
20294.41.17.7

House Finch Survey Routes in Illinois

Routes recording House Finch in Illinois.
Wayne4120241990
Itasca2420241988
Sheffield1420241991
New Lenox1420191988
Williamsfld1220241992
Seneca1220241993
Terre Haute1120241989
Beaucoup1120241992
Mt Vernon1120241990
Union1120172001
Pontiac1020241993
Belleview1020241990
Harristown1020242001
Cameron920241988
Bartonville920241992
Mackinaw920241991
Janesville920241992
Columbia920241992
Cherry Val 2920182004
Buda820231994
Newark820221989
Monticello820241989
Lake Summerset820222001
Dudleyville820242001
Cherry Val720031990

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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