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

House Sparrow Population Trend in Nevada

All statesGeneralists

House Sparrow in Nevada has surged: up 293% on the route-weighted index since 1970.

+293%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 →
48YearsYears 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 293% 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 rise about 108% by 2029 — from 8.8 in 2024 to a central estimate of 18 (95% range 0.00–39). A 5-year backtest shows a typical error of ±55.9%, with 100% of held-out values landing inside the 95% band.

+108%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 →
18Projected 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 →
0.00–3995% 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 →
±55.9%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 rise about 108% by 2029 — from 8.8 in 2024 to a central estimate of 18 (95% range 0.00–39). A 5-year backtest shows a typical error of ±55.9%, 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 →
2025180.0038
2026180.0038
2027180.0039
2028180.0039
2029180.0039

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 →
Fallon15720241992
Carson River11320022001
Jean Lake8620131973
Beatty7020211987
Hawthorne7020011997
Gardnerville4320121992
Chimney Res.3020242023
Toiyabe Nf2520241987
Frenchman1519781973
Oreana1120032002
Nelson1020241996
Ash Meadows819991999
Majors Place819961996
Mill City820232013
Hiko620231968
Val Of Fire620241990
Silver Peak520061971
Ruby Valley 2420242007
Meadow Vally420241999
Gardnerville 2420242013
Cortez320241969
Virgin Creek320102010
Nixon320241973
Dinner Sta219681968
Rye Patch219871969

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 2026-05-22.