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

Chipping Sparrow Population Trend in West Virginia

All statesGeneralists

Chipping Sparrow in West Virginia has declined: down 40% on the route-weighted index since 1968.

-40%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 Chipping 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 Chipping Sparrow in West Virginia. See the full index history below.

Chipping Sparrow Population Forecast in West Virginia

If the recent trend holds, Chipping Sparrow in West Virginia is projected to stay roughly flat through 2029, near 12 (95% range 7.6–17). A 5-year backtest shows a typical error of ±6.3%, with 100% of held-out values landing inside the 95% band.

-10%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 →
12Projected 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 →
7.6–1795% 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 →
±6.3%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, Chipping Sparrow in West Virginia is projected to stay roughly flat through 2029, near 12 (95% range 7.6–17). A 5-year backtest shows a typical error of ±6.3%, with 100% 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 →
2025138.317
2026138.117
2027137.917
2028127.817
2029127.617

Chipping Sparrow Survey Routes in West Virginia

Routes recording Chipping 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 →
Sleepy Creek4119901966
Hix3920241970
Martinsburg3920241966
Shanghai3920221995
Rio3719951974
Mt Storm3419751966
Denmar3020241980
Bismark3020231976
Clinton2720241966
Berryburg2519961975
Ghent2420241978
Mcdonald2220231987
Josephs Mill2120241993
Bebee2020241972
Albright2019741966
Ruthbelle1820241975
Washburn1720221974
Clear Creek1620241988
Meadland1620241997
Glade Run1620021988
Henderson1620232002
Hanover1520241980
Valley Head1520241966
Green Bank1520241977
Smithfield1520241993

Chipping Sparrow Population Trend in Other States

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

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