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

House Sparrow Population Trend in Wyoming

All statesGeneralists

House Sparrow in Wyoming has edged up: up 22% on the route-weighted index since 1970.

+22%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 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 64% by 2029 — from 6.9 in 2024 to a central estimate of 2.5 (95% range 0.00–8.4). A 5-year backtest shows a typical error of ±42.5%, with 100% of held-out values landing inside the 95% band.

-64%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 →
2.5Projected 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 →
0.00–8.495% 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 →
±42.5%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 Wyoming is projected to fall about 64% by 2029 — from 6.9 in 2024 to a central estimate of 2.5 (95% range 0.00–8.4). A 5-year backtest shows a typical error of ±42.5%, 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 →
20252.90.008.8
20262.80.008.7
20272.70.008.6
20282.60.008.5
20292.50.008.4

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 →
Midvale12720241974
Lingle11320241980
Newcastle4420241994
Basin4320241970
Cody4020241988
Frannie3120241989
Elk Horn3020182002
Dayton2820241980
Yoder2520241968
Carter 22520242017
Clarkelen1719781975
Harmony1720231988
Highlight1520071989
Kaycee1520242022
Cheyenne1420241983
Otto1320241970
Mckinnon1319831976
Dubois1219911982
Clark1220102001
Meeteetse1120241991
Dwyer1020161992
Savery1019931992
Pine Bluff1020241979
Recluse920221981
Chugwater920241979

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 2026-05-22.