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

House Sparrow Population Trend in Nevada

All statesGeneralists

House Sparrow in Nevada has surged: up 261% on the route-weighted index since 1970.

+261%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 →
32Routes 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 →
49YearsYears 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 NevadaNotable 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 →

House Sparrow has surged in Nevada: up 261% on the route-weighted index since 1970.

House Sparrow Population Forecast in Nevada

If the recent trend holds, House Sparrow in Nevada is projected to stay roughly flat through 2030, near 19 (95% range 0.00–39). A 5-year backtest shows a typical error of ±30.3%, with 100% of held-out values landing inside the 95% band.

-1%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 →
19Projected 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 →
0.00–3995% 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 →
±30.3%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 Nevada is projected to stay roughly flat through 2030, near 19 (95% range 0.00–39). A 5-year backtest shows a typical error of ±30.3%, 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 →
2026180.0038
2027180.0038
2028180.0039
2029180.0039
2030190.0039

House Sparrow Survey Routes in Nevada

Routes recording House Sparrow in Nevada.
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 →
Fallon30620251992
Carson River11320022001
Jean Lake8620131973
Hawthorne7020011997
Gardnerville4320121992
Gardnerville 22620252013
Toiyabe Nf2520241987
Chimney Res.2020252023
Frenchman1519781973
Silver Peak 21220252017
Oreana1120032002
Nixon1020251973
Majors Place819961996
Mill City820232013
Hiko720251968
Beatty720251987
Silver Peak520061971
Val Of Fire520251990
Ruby Valley 2420242007
Cortez320241969
Virgin Creek320102010
Dinner Sta219681968
Rye Patch219871969
Austin220142014
Meadow Vally220251999

House Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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