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

House Sparrow Population Trend in Utah

All statesGeneralists

House Sparrow in Utah has edged down: down 19% on the route-weighted index since 1970.

-19%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 House Sparrow 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 House Sparrow in Utah. See the full index history below.

House Sparrow Population Forecast in Utah

If the recent trend holds, House Sparrow in Utah is projected to fall about 13% by 2030 — from 10 in 2025 to a central estimate of 9.0 (95% range 0.00–22). A 5-year backtest shows a typical error of ±36.5%, with 100% of held-out values landing inside the 95% band.

-13%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 →
9.0Projected 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 →
0.00–2295% 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 →
±36.5%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, House Sparrow in Utah is projected to fall about 13% by 2030 — from 10 in 2025 to a central estimate of 9.0 (95% range 0.00–22). A 5-year backtest shows a typical error of ±36.5%, 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 →
20269.50.0023
20279.40.0023
20289.20.0023
20299.10.0022
20309.00.0022

House Sparrow Survey Routes in Utah

Routes recording House Sparrow 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 →
Goshen20620251968
Delta11920251987
Kamas9420251997
Wellington 34620252012
Aneth4220241986
Bear River4220251992
Beaver3420251968
Wellington3420021997
Pine Creek3120251998
Grantsville2920252001
Shivwitz2520102008
Oak City2220241972
Bicknell2220251999
Escalante2020251998
Wellington 21520112003
Jensen1320251993
Woodruff1120252002
Vernon1120251993
Stock Res1020211987
Bullfrog Bay1020172002
Iron Springs820231979
Newcastle820211997
Moab820251986
Timpie Spg720031978
Hanna720241997

House Sparrow 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.