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

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 →
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 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 2029, near 6.7 (95% range 4.3–9.1). A 5-year backtest shows a typical error of ±11.5%, with 100% of held-out values landing inside the 95% band.

-6%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 →
6.7Projected 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 →
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 →
±11.5%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, Acadian Flycatcher in West Virginia is projected to stay roughly flat through 2029, near 6.7 (95% range 4.3–9.1). A 5-year backtest shows a typical error of ±11.5%, 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 →
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20266.74.39.1
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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
Nicut2020241986
Cedarville2020231982
Smithfield2020241993
Breeden1920241986
Strange Crk1820241982
Meadland1620241997
Josephs Mill1620241993
Meadowville1520241974
Clinton1420241966
Bowden1320241993
Shanghai1220221999
Fayetteville1119961980
Denmar1120241980
Olcott920241966
Washburn920221974
Mcdonald920231987
Ghent820241978
Yawkey820241966
Berryburg819961976
Clear Creek720241988
Hubbardstown720231966
Three Forks720241971
Sutton720241976
Hix620241970

Acadian Flycatcher Population Trend in Other States

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

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