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

House Finch Population Trend in Washington

All statesGeneralists

House Finch in Washington has surged: up 151% on the route-weighted index since 1970.

+151%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 →
88Routes 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 WashingtonNotable 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 Washington: up 151% on the route-weighted index since 1970.

House Finch Population Forecast in Washington

If the recent trend holds, House Finch in Washington is projected to stay roughly flat through 2030, near 10 (95% range 5.6–15). A 5-year backtest shows a typical error of ±35.3%, with 100% of held-out values landing inside the 95% band.

+5%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 →
10Projected 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 →
5.6–1595% 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 →
±35.3%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 Washington is projected to stay roughly flat through 2030, near 10 (95% range 5.6–15). A 5-year backtest shows a typical error of ±35.3%, with 100% 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 →
20269.85.314
20279.95.414
202810.05.515
2029105.615
2030105.615

House Finch Survey Routes in Washington

Routes recording House Finch in Washington.
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 →
Port Angeles12120251970
Scootney Reservoir8820252009
Wapato7620221971
Mesa6720081994
Potholes4420231996
Pomona4319991998
Quincy4020241981
Nighthawk3620251992
Twisp3220241970
Yakima2920251993
Mukilteo2820251993
Warm Beach 22520242018
Moses Lake2420221982
Vashon Is.2220251995
Columbia Nwr1920221992
Lake Chelan1820251988
Malden1620251998
Warm Beach1420171968
Ellensburg1320251981
Ardenvoir1219871969
Everett1220251975
Leavenworth1120241984
Hartline1020241995
Odessa1020251994
Othello919911982

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.