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

Acadian Flycatcher Population Trend in West Virginia

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Acadian Flycatcher in West Virginia has held roughly steady: down 7% on the route-weighted index since 1968.

-7%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 →
64Routes 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 Acadian Flycatcher 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 Acadian Flycatcher in West Virginia. See the full index history below.

Acadian Flycatcher Population Forecast in West Virginia

If the recent trend holds, Acadian Flycatcher in West Virginia is projected to stay roughly flat through 2030, near 6.7 (95% range 4.3–9.1). A 5-year backtest shows a typical error of ±7.7%, 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 →
6.7Projected 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 →
4.3–9.195% 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 →
±7.7%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, Acadian Flycatcher in West Virginia is projected to stay roughly flat through 2030, near 6.7 (95% range 4.3–9.1). A 5-year backtest shows a typical error of ±7.7%, 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 →
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Acadian Flycatcher Survey Routes in West Virginia

Routes recording Acadian Flycatcher 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 →
Stollings2820211986
Nicut2720251986
Strange Crk2520251982
Meadowville2120251974
Cedarville2020231982
Breeden1920241986
Ringgold1820252025
Josephs Mill1620241993
Sutton1320251976
Bowden1320251993
Denmar1220251980
Smoot1120251980
Fayetteville1119961980
Three Forks1120251971
Olcott920241966
Mcdonald920231987
Yawkey820241966
Berryburg819961976
Ruthbelle820251976
Pedro720251979
Moundsville720251972
Martinsburg720251966
Hix620251970
Ghent620251978
Clear Creek620251988

Acadian Flycatcher Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawisconsin

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