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

Eastern Bluebird Population Trend in West Virginia

All statesForest birds

Eastern Bluebird in West Virginia has edged down: down 13% on the route-weighted index since 1968.

-13%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 →
62Routes 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 Eastern Bluebird 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 Eastern Bluebird in West Virginia. See the full index history below.

Eastern Bluebird Population Forecast in West Virginia

If the recent trend holds, Eastern Bluebird in West Virginia is projected to fall about 16% by 2029 — from 6.2 in 2024 to a central estimate of 5.2 (95% range 2.9–7.4). A 5-year backtest shows a typical error of ±14.5%, with 100% of held-out values landing inside the 95% band.

-16%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 →
5.2Projected 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 →
2.9–7.495% 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 →
±14.5%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, Eastern Bluebird in West Virginia is projected to fall about 16% by 2029 — from 6.2 in 2024 to a central estimate of 5.2 (95% range 2.9–7.4). A 5-year backtest shows a typical error of ±14.5%, 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 →
20255.33.07.5
20265.23.07.5
20275.23.07.4
20285.23.07.4
20295.22.97.4

Eastern Bluebird Survey Routes in West Virginia

Routes recording Eastern Bluebird 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 →
Clendenin2620241979
Ruthbelle2020241975
Slate1720241980
Mcdonald1720231987
Lost River1720231996
Washburn1520221974
Arlee1419791966
Spencer1420231986
Sugar Grove1420241966
Rockport1420241966
Hix1320241970
Martinsburg1120241966
Smoot1020241980
Pt Pleasant1020231973
Bebee1020241972
Hubbardstown920231966
Meadland920241997
Josephs Mill920241993
Sleepy Creek919901966
Olcott820241966
Nicut720241986
Cedarville720231982
Henderson720232002
Moundsville620241972
Berryburg619961975

Eastern Bluebird Population Trend in Other States

alabamaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawisconsinwyoming

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