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

House Finch Population Trend in Michigan

All statesGeneralists

House Finch in Michigan has surged: up 37× on the route-weighted index since 1987.

37×Since 1987TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
84Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
39YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable House Finch Trends in MichiganNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

House Finch has surged in Michigan: up 37× on the route-weighted index since 1987.

House Finch Population Forecast in Michigan

If the recent trend holds, House Finch in Michigan is projected to stay roughly flat through 2029, near 5.7 (95% range 0.00–14). A 5-year backtest shows a typical error of ±16.6%, with 100% of held-out values landing inside the 95% band.

-8%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
5.7Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–1495% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±16.6%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, House Finch in Michigan is projected to stay roughly flat through 2029, near 5.7 (95% range 0.00–14). A 5-year backtest shows a typical error of ±16.6%, with 100% of held-out values landing inside the 95% band.19832029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20255.90.0014
20265.80.0014
20275.80.0014
20285.70.0014
20295.70.0014

House Finch Survey Routes in Michigan

Routes recording House Finch in Michigan.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
St Charles3920191987
Cohoctah3120242021
North Branch3019991989
Lapeer2620242000
Belding 22420242004
New Troy2320241986
Galesburg2220241988
Howardsville2120241989
Belding2020031991
Adair2019951990
Holt1920241992
Richmond1820241999
New Buffalo1720141992
Almena1420151993
Coopersville1320241990
Mottville1220241988
Lawrence1120241986
No Bradley1120241987
S Lyons1119921983
Hamburg 21120242004
Owendale1020171991
Skegemog Pt820141994
Traverse Cty819921992
Nashville720241989
Monterey720241988

House Finch Population Trend in Other States

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

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