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

European Starling Population Trend in Utah

All statesGeneralists

European Starling in Utah has edged up: up 17% on the route-weighted index since 1970.

+17%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 →
76Routes 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 UtahNotable 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 Utah. See the full index history below.

European Starling Population Forecast in Utah

If the recent trend holds, European Starling in Utah is projected to stay roughly flat through 2030, near 7.9 (95% range 0.00–21). A 5-year backtest shows a typical error of ±12.7%, with 100% of held-out values landing inside the 95% band.

+1%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 →
7.9Projected 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 →
0.00–2195% 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 →
±12.7%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 Utah is projected to stay roughly flat through 2030, near 7.9 (95% range 0.00–21). A 5-year backtest shows a typical error of ±12.7%, 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 →
20268.30.0021
20278.20.0021
20288.10.0021
20298.00.0021
20307.90.0021

European Starling Survey Routes in Utah

Routes recording European Starling in Utah.
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 →
Goshen16520251968
Timpie Spg11720031978
Hanna11020241997
Kamas10220251997
Bear River6520251992
Castle Dale6020071996
Fayette3520091995
Wellington 33220252012
Vernon3220251992
Promontory2920251969
Grantsville2720252001
Woodruff2320252002
Fairfield2020241987
Stock Res1520171996
Alton1520111997
Lost Cr. Res1220031996
Beaver1220251968
Leamington1220171993
Neponset Res1120181997
Oak City1020241973
E. Bear Lake820221995
Castleton819701970
Lynn820251982
Escalante820251998
Saleratus Cr720181995

European Starling Population Trend in Other States

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

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