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

House Sparrow Population Trend in Wyoming

All statesGeneralists

House Sparrow in Wyoming has increased: up 34% on the route-weighted index since 1970.

+34%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 House Sparrow 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 →

No notable trend signals for House Sparrow in Wyoming. See the full index history below.

House Sparrow Population Forecast in Wyoming

If the recent trend holds, House Sparrow in Wyoming is projected to fall about 53% by 2030 — from 5.6 in 2025 to a central estimate of 2.6 (95% range 0.00–8.5). A 5-year backtest shows a typical error of ±42.8%, with 100% of held-out values landing inside the 95% band.

-53%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 →
2.6Projected 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 →
0.00–8.595% 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 →
±42.8%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 Wyoming is projected to fall about 53% by 2030 — from 5.6 in 2025 to a central estimate of 2.6 (95% range 0.00–8.5). A 5-year backtest shows a typical error of ±42.8%, 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 →
20262.90.008.8
20272.90.008.7
20282.80.008.7
20292.70.008.6
20302.60.008.5

House Sparrow Survey Routes in Wyoming

Routes recording House Sparrow 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 →
Lingle11320241980
Midvale6220251974
Yoder5920251968
Frannie4420251989
Dwyer3720251992
Tensleep3120251995
Elk Horn3020182002
Harmony2720251988
Worland2520251995
Pine Bluff2220251979
Ethete2020251991
Cheyenne2020251983
Caballa Crk1920251993
Meeteetse1820251991
Clarkelen1719781975
Carter 21720252017
Highlight1520071989
Rock Springs 21520252023
Reliance1520251978
Cody1420251988
Basin1420251970
Mckinnon1319831976
Clark1220102001
Boulder1120251999
Savery1019931992

House Sparrow Population Trend in Other States

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

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