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

Louisiana Waterthrush Population Trend in West Virginia

All statesForest birds

Louisiana Waterthrush in West Virginia has risen sharply: up 57% on the route-weighted index since 1968.

+57%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 →
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 Louisiana Waterthrush 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 increasecomputed 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 →

Louisiana Waterthrush has risen sharply in West Virginia: up 57% on the route-weighted index since 1968.

Louisiana Waterthrush Population Forecast in West Virginia

If the recent trend holds, Louisiana Waterthrush in West Virginia is projected to stay roughly flat through 2030, near 1.7 (95% range 0.98–2.5). A 5-year backtest shows a typical error of ±20.7%, with 80% 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 →
1.7Projected 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 →
0.98–2.595% 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 →
±20.7%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, Louisiana Waterthrush in West Virginia is projected to stay roughly flat through 2030, near 1.7 (95% range 0.98–2.5). A 5-year backtest shows a typical error of ±20.7%, with 80% 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 →
20261.70.942.5
20271.70.952.5
20281.70.962.5
20291.70.972.5
20301.70.982.5

Louisiana Waterthrush Survey Routes in West Virginia

Routes recording Louisiana Waterthrush 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 →
Lost River1220251997
Stollings920211994
Strange Crk720251982
Rio719951974
Valley Head620251973
Meadowville620251972
Clear Creek520251988
Olcott520231966
Mcdonald520231993
Yellow Spg520221975
Ghent420251978
Hubbardstown420251967
Ringgold420252025
Shanghai420221999
Yawkey320241967
Green Bank320231977
Washburn320221974
Hix220251970
Pedro220231979
Welch220252018
Breeden220241986
Spencer220221986
Three Forks220251971
Sutton220251976
Denmar220251980

Louisiana Waterthrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawisconsin

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