BirdAnalyst
Species · Oregon · BBS 2026 Release · 1966–2025

House Finch Population Trend in Oregon

All statesGeneralists

House Finch in Oregon has declined: down 46% on the route-weighted index since 1970.

-46%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 →
101Routes 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 →
57YearsYears 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 →

No notable trend signals for House Finch in Oregon. See the full index history below.

House Finch Population Forecast in Oregon

If the recent trend holds, House Finch in Oregon is projected to fall about 51% by 2030 — from 4.8 in 2025 to a central estimate of 2.4 (95% range 0.00–5.2). A 5-year backtest shows a typical error of ±46.6%, with 80% of held-out values landing inside the 95% band.

-51%Change by 2030TrendPercent 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 →
2.4Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–5.295% 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 →
±46.6%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 Oregon is projected to fall about 51% by 2030 — from 4.8 in 2025 to a central estimate of 2.4 (95% range 0.00–5.2). A 5-year backtest shows a typical error of ±46.6%, with 80% of held-out values landing inside the 95% band.19682030
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 →
20262.60.005.4
20272.60.005.4
20282.50.005.3
20292.40.005.3
20302.40.005.2

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 →
Dayton8720251973
Tualatin4520251968
Salem4520251993
Canby3520251993
Deschutes3420251968
Scappoose2320251995
Svensen1919921990
Emigrant Lk1820011972
Modoc Point 21720252024
Green1720251994
Garfield1620251973
Adair1320251971
Umatilla1320231988
Merrill1320221993
Umpqua1220251968
Modoc Point1120181969
Elkton920251972
Bridgeport820251987
Ordnance719791973
Hauser719851971
Barnes Val719711971
Montague720251975
Pendleton720251981
Clover Creek720251972
Emigrant Lake 2720252002

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 2026-08-14.