BirdAnalyst
Species · West Virginia · BBS 2026 Release · 1966–2025

House Sparrow Population Trend in West Virginia

All statesGeneralists

House Sparrow in West Virginia has collapsed: down 88% on the route-weighted index since 1968.

-88%Since 1968TrendPercent 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 →
61Routes 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 →
59YearsYears 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 West VirginiaNotable 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 declinecomputed 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 collapsed in West Virginia: down 88% on the route-weighted index since 1968.

House Sparrow Population Forecast in West Virginia

If the recent trend holds, House Sparrow in West Virginia is projected to fall about 100% by 2030 — from 11 in 2025 to a central estimate of 0.00 (95% range 0.00–22). A 5-year backtest shows a typical error of ±128%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–2295% 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 →
±128%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 West Virginia is projected to fall about 100% by 2030 — from 11 in 2025 to a central estimate of 0.00 (95% range 0.00–22). A 5-year backtest shows a typical error of ±128%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20260.000.0022
20270.000.0022
20280.000.0022
20290.000.0022
20300.000.0022

House Sparrow Survey Routes in West Virginia

Routes recording House Sparrow in West Virginia.
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 →
Welch7620251980
Arlee4519791966
Smithfield4420251996
Martinsburg3720251966
Hanover3620251980
Meadland3220251997
Sleepy Creek3019901966
Ruthbelle2820251975
Ringgold2820252025
Paradise2620251966
Slate2620251980
Greer2320231966
Albright2319741966
Clinton2320251966
Mt Storm2219751966
Mcdonald2120231987
Monongah1920221966
Rio1319951974
Pedro1220251979
Rockport1220251966
Hix1120251970
Sutton1120251976
Meadowville1020251972
Three Forks820251971
Josephs Mill820241993

House Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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