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

European Starling Population Trend in Washington

All statesGeneralists

European Starling in Washington has increased: up 38% on the route-weighted index since 1970.

+38%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 →
102Routes 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 European Starling 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 European Starling in Washington. See the full index history below.

European Starling Population Forecast in Washington

If the recent trend holds, European Starling in Washington is projected to rise about 34% by 2030 — from 29 in 2025 to a central estimate of 39 (95% range 18–60). A 5-year backtest shows a typical error of ±23.9%, with 100% of held-out values landing inside the 95% band.

+34%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 →
39Projected 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 →
18–6095% 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 →
±23.9%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, European Starling in Washington is projected to rise about 34% by 2030 — from 29 in 2025 to a central estimate of 39 (95% range 18–60). A 5-year backtest shows a typical error of ±23.9%, 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 →
2026391860
2027391860
2028391860
2029391860
2030391860

European Starling Survey Routes in Washington

Routes recording European Starling 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 →
South Elma43620241975
Wapato31620221971
Pomona26819991998
Scootney Reservoir17720252009
Harwood16819971993
Mendota15919881977
Columbia Nwr15320221992
Ewan15120191983
Keystone15020251994
Mesa14220081994
Warm Beach13520171968
Chewelah13220211977
Mukilteo11720251993
Port Angeles10620251970
Everett9220251975
Raymond8920211993
Mendota 28920001989
Hanford Site8619961988
Ewan 27920252023
Richland7820242006
Potholes7320231996
Moses Lake6920221973
Warm Beach 26720242018
Camas6020181971
Carnation5820251988

European Starling Population Trend in Other States

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

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