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

House Sparrow Population Trend in Utah

All statesGeneralists

House Sparrow in Utah has edged down: down 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 →
55Routes 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 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 48% by 2029 — from 17 in 2024 to a central estimate of 9.0 (95% range 0.00–23). A 5-year backtest shows a typical error of ±40%, with 100% of held-out values landing inside the 95% band.

-48%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 →
9.0Projected 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 →
0.00–2395% 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 →
±40%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 48% by 2029 — from 17 in 2024 to a central estimate of 9.0 (95% range 0.00–23). A 5-year backtest shows a typical error of ±40%, 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 →
20259.50.0023
20269.40.0023
20279.30.0023
20289.20.0023
20299.00.0023

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 →
Delta60720241987
Goshen10820241968
Kamas8820241997
Bear River6720231992
Aneth4220241986
Wellington3420021997
Escalante3120241998
Shivwitz2520102008
Oak City2220241972
Beaver2120241968
Wellington 32020242012
Grantsville1920242001
Wellington 21520112003
Jensen1320241993
Pine Creek1120231998
Stock Res1020211987
Bullfrog Bay1020172002
Iron Springs 2920242024
Iron Springs820231979
Randolph820241992
Newcastle820211997
Timpie Spg720031978
Hanna720241997
Alton720191997
Moab720241986

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 2026-05-22.