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

American Goldfinch Population Trend in Washington

All statesForest birds

American Goldfinch in Washington 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 →
99Routes 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 American Goldfinch 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 →

No notable trend signals for American Goldfinch in Washington. See the full index history below.

American Goldfinch Population Forecast in Washington

If the recent trend holds, American Goldfinch in Washington is projected to stay roughly flat through 2030, near 5.6 (95% range 1.9–9.3). A 5-year backtest shows a typical error of ±14%, with 100% of held-out values landing inside the 95% band.

-0%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 →
5.6Projected 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 →
1.9–9.395% 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 →
±14%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, American Goldfinch in Washington is projected to stay roughly flat through 2030, near 5.6 (95% range 1.9–9.3). A 5-year backtest shows a typical error of ±14%, 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 →
20266.02.39.7
20275.92.29.6
20285.82.19.5
20295.72.09.4
20305.61.99.3

American Goldfinch Survey Routes in Washington

Routes recording American Goldfinch 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 Angeles6020251970
Warm Beach6020171968
South Elma3820241975
Vashon Is.2520251995
Raymond2420211993
Warm Beach 22320242018
Mendota2219881977
Twisp2020241969
Everett1920251975
Potholes1720231996
Raymond 21720242022
Reardan1620241968
Kendall1620251981
Bay View1620171993
Mukilteo1620251993
Wilbur1520241985
Rainier1320251993
Deception1320181992
Brewster1220181977
Scootney Reservoir1120252009
Nighthawk1020251992
Mendota 21020001989
Cougar920231968
Carnation920251988
Waitsburg920041994

American Goldfinch Population Trend in Other States

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

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