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

European Starling Population Trend in Wyoming

All statesGeneralists

European Starling in Wyoming has surged: up 544% on the route-weighted index since 1970.

+544%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 →
116Routes 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 WyomingNotable 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 increasecomputed 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 surged in Wyoming: up 544% on the route-weighted index since 1970.

European Starling Population Forecast in Wyoming

If the recent trend holds, European Starling in Wyoming is projected to fall about 53% by 2029 — from 38 in 2024 to a central estimate of 18 (95% range 7.2–29). A 5-year backtest shows a typical error of ±46.2%, with 40% of held-out values landing inside the 95% band.

-53%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 →
18Projected 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 →
7.2–2995% 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 →
±46.2%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 Wyoming is projected to fall about 53% by 2029 — from 38 in 2024 to a central estimate of 18 (95% range 7.2–29). A 5-year backtest shows a typical error of ±46.2%, with 40% 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 →
2025176.428
2026176.628
2027186.828
2028187.028
2029187.229

European Starling Survey Routes in Wyoming

Routes recording European Starling in Wyoming.
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 →
Yoder48620241968
Arvada42520241982
Cody36520241983
Lingle26720241980
Dayton25520241980
Meeteetse15120241991
Mayoworth14620241983
Ethete12120241991
Midvale11520241974
Riverview9120222014
Walcott8620241985
Frannie7620241989
Mtn View7120241980
Recluse6720221981
Tensleep6420241995
Rozet6320231993
Basin6120241970
Newcastle5520241994
Shawnee5420241995
Upton5220241988
Worland5020242009
Green River4919841977
Sussex4720241991
Raven4020241993
Kaycee3420242024

European Starling Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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