BirdAnalyst
Species · West Virginia · BBS 2025 Release · 1966–2024

Song Sparrow Population Trend in West Virginia

All statesGeneralists

Song Sparrow in West Virginia has edged up: up 10% on the route-weighted index since 1968.

+10%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 →
63Routes 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 →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Song 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 →

No notable trend signals for Song Sparrow in West Virginia. See the full index history below.

Song Sparrow Population Forecast in West Virginia

If the recent trend holds, Song Sparrow in West Virginia is projected to stay roughly flat through 2029, near 28 (95% range 24–32). A 5-year backtest shows a typical error of ±8.5%, with 60% of held-out values landing inside the 95% band.

-3%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 →
28Projected 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 →
24–3295% 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 →
±8.5%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, Song Sparrow in West Virginia is projected to stay roughly flat through 2029, near 28 (95% range 24–32). A 5-year backtest shows a typical error of ±8.5%, with 60% of held-out values landing inside the 95% band.19662029
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 →
2025282432
2026282432
2027282432
2028282432
2029282432

Song Sparrow Survey Routes in West Virginia

Routes recording Song 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 →
Meadland6520241997
Clinton6220241966
Monongah5720221966
Mcdonald5720231987
Welch5120231980
Josephs Mill4720241993
Clendenin4520241979
Cedarville4120231982
Rockport4020241966
Pt Pleasant3920231973
Hubbardstown3920231966
Nicut3720241986
Smithfield3620241993
Spencer3520231986
Hanover3420241980
Valley Head3420241966
Bramwell3320231978
Yawkey3320241966
Olcott3320241966
Ghent3220241978
Moundsville3220241972
Meadowville3220241972
Breeden3120241986
Slate3120241980
Bebee3020241972

Song Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.