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

European Starling Population Trend in Idaho

All statesGeneralists

European Starling in Idaho has fallen sharply: down 66% on the route-weighted index since 1970.

-66%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 →
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 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 66% 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 2030, near 12 (95% range 0.00–45). A 5-year backtest shows a typical error of ±18.9%, with 100% of held-out values landing inside the 95% band.

+4%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 →
12Projected 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 →
0.00–4595% 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 →
±18.9%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 Idaho is projected to stay roughly flat through 2030, near 12 (95% range 0.00–45). A 5-year backtest shows a typical error of ±18.9%, 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 →
2026150.0048
2027140.0047
2028140.0046
2029130.0046
2030120.0045

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
Mud Lake16220251988
Ririe13520251971
Cedar Hill13220241989
Bates7320231988
Blacks Creek6320171968
Baker5520241974
Cascade5119841968
Springfield4520181969
Dubois3320251970
Henry3219831973
Gifford2820171971
Pasadena Val2820161987
Joel2620241989
Iron Springs2420241988
Leadore2220241974
Triangle2220251985
Craters2120181979
Carey1820181989
Mora1320252018
Coolin1220251986
Preston1220231988
Picabo1120251988
Grangeville1019861986

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 2026-08-14.