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

House Finch Population Trend in Washington

All statesGeneralists

House Finch in Washington has surged: up 129% on the route-weighted index since 1970.

+129%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 →
87Routes 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 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 129% 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 rise about 21% by 2029 — from 8.4 in 2024 to a central estimate of 10 (95% range 5.5–15). A 5-year backtest shows a typical error of ±44.4%, with 100% of held-out values landing inside the 95% band.

+21%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 →
10Projected 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 →
5.5–1595% 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 →
±44.4%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 rise about 21% by 2029 — from 8.4 in 2024 to a central estimate of 10 (95% range 5.5–15). A 5-year backtest shows a typical error of ±44.4%, 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 →
20259.75.214
20269.85.314
20279.95.314
202810.05.415
2029105.515

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 Angeles9820241970
Wapato7620221971
Mesa6720081994
Potholes4420231996
Pomona4319991998
Quincy4020241981
Twisp3220241970
Mukilteo2820241993
Yakima2720241993
Malden2520241998
Warm Beach 22520242018
Moses Lake2420221982
Scootney Reservoir2420242009
Nighthawk2320241992
Columbia Nwr1920221992
Everett1820241975
Ellensburg1820241981
Reardan1620241968
Lake Chelan1620241988
Warm Beach1420171968
Vashon Is.1420241995
Kendall1320241981
Ardenvoir1219871969
Leavenworth1120241984
Hartline1020241995

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 2026-05-22.