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

European Starling Population Trend in Utah

All statesGeneralists

European Starling in Utah has edged up: up 23% on the route-weighted index since 1970.

+23%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 →
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 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 fall about 21% by 2029 — from 10 in 2024 to a central estimate of 8.0 (95% range 0.00–21). A 5-year backtest shows a typical error of ±11.1%, with 100% of held-out values landing inside the 95% band.

-21%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 →
8.0Projected 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 →
0.00–2195% 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 →
±11.1%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 fall about 21% by 2029 — from 10 in 2024 to a central estimate of 8.0 (95% range 0.00–21). A 5-year backtest shows a typical error of ±11.1%, 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 →
20258.50.0022
20268.40.0022
20278.30.0021
20288.10.0021
20298.00.0021

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 →
Timpie Spg11720031978
Hanna11020241997
Promontory8620241969
Kamas7420241997
Wellington 36420242012
Castle Dale6020071996
Goshen5320241968
Beaver4820241968
Delta3620241987
Fayette3520091995
Randolph3220241992
Woodruff2320242002
Fairfield2020241987
Bear River1920231992
Stock Res1520171996
Alton1520111997
Snowville1420241999
Grantsville1420242001
Lost Cr. Res1220031996
Leamington1220171993
Neponset Res1120181997
Lynn1120231982
Oak City1020241973
Newcastle1020221997
Notom1020211987

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 2026-05-22.