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

House Finch Population Trend in Oregon

All statesGeneralists

House Finch in Oregon has fallen sharply: down 50% on the route-weighted index since 1970.

-50%Since 1970TrendPercent 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 →
100Routes 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 →
56YearsYears 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 OregonNotable 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 declinecomputed 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 fallen sharply in Oregon: down 50% on the route-weighted index since 1970.

House Finch Population Forecast in Oregon

If the recent trend holds, House Finch in Oregon is projected to fall about 48% by 2029 — from 4.4 in 2024 to a central estimate of 2.3 (95% range 0.00–5.0). A 5-year backtest shows a typical error of ±39.8%, with 100% of held-out values landing inside the 95% band.

-48%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 →
2.3Projected 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 →
0.00–5.095% 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 →
±39.8%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 Oregon is projected to fall about 48% by 2029 — from 4.4 in 2024 to a central estimate of 2.3 (95% range 0.00–5.0). A 5-year backtest shows a typical error of ±39.8%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20252.50.005.3
20262.50.005.2
20272.40.005.2
20282.30.005.1
20292.30.005.0

House Finch Survey Routes in Oregon

Routes recording House Finch in Oregon.
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 →
Dayton6620241973
Salem6120241993
Tualatin5620241968
Deschutes3920241968
Modoc Point 22320242024
Umpqua1920241968
Adair1920241971
Svensen1919921990
Emigrant Lk1820011972
Green1820241994
Garfield1520231973
Umatilla1320231988
Merrill1320221993
Clover Creek1220241972
Bridgeport1120221987
Modoc Point1120181969
Montague920241975
Canby820241993
Ordnance719791973
Hauser719851971
Barnes Val719711971
Elkton720241972
Wagontire620241977
Pendleton620241981
Camp Sherman619941983

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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