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

European Starling Population Trend in Idaho

All statesGeneralists

European Starling in Idaho has fallen sharply: down 58% on the route-weighted index since 1970.

-58%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 →
56Routes 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 European Starling Trends in IdahoNotable 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 declinecomputed 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 →

European Starling has fallen sharply in Idaho: down 57% on the route-weighted index since 1970.

European Starling Population Forecast in Idaho

If the recent trend holds, European Starling in Idaho is projected to stay roughly flat through 2029, near 14 (95% range 0.00–47). A 5-year backtest shows a typical error of ±13.2%, with 100% of held-out values landing inside the 95% band.

-9%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 →
14Projected 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 →
0.00–4795% 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 →
±13.2%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 Idaho is projected to stay roughly flat through 2029, near 14 (95% range 0.00–47). A 5-year backtest shows a typical error of ±13.2%, 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 →
2025160.0049
2026160.0049
2027150.0048
2028140.0047
2029140.0047

European Starling Survey Routes in Idaho

Routes recording European Starling in Idaho.
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 →
Glenns Ferry25319861968
Pocatello21620191979
Cedar Hill13220241989
Mud Lake11920231988
Bates7320231988
Blacks Creek6320171968
Ririe5820231971
Baker5520241974
Cascade5119841968
Mora4820242018
Springfield4520181969
Picabo3320211988
Henry3219831973
Naples2920231972
Gifford2820171971
Pasadena Val2820161987
Joel2620241989
Daniels Res2620191988
Iron Springs2420241988
Leadore2220241974
Dubois2120241970
Craters2120181979
Triangle2120241985
Carey1820181989
Almo1420231988

European Starling Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.