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

Brown Creeper Population Trend in West Virginia

All statesForest birds

Brown Creeper in West Virginia has surged: up 754% on the route-weighted index since 1980.

+754%Since 1980TrendPercent 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 →
16Routes 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 →
31YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Brown Creeper 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 →

Brown Creeper has surged in West Virginia: up 754% on the route-weighted index since 1980.

Brown Creeper Population Forecast in West Virginia

If the recent trend holds, Brown Creeper in West Virginia is projected to fall about 37% by 2029 — from 0.46 in 2024 to a central estimate of 0.29 (95% range 0.08–0.50). A 5-year backtest shows a typical error of ±24.5%, with 80% of held-out values landing inside the 95% band.

-37%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 →
0.29Projected 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 →
0.08–0.5095% 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 →
±24.5%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, Brown Creeper in West Virginia is projected to fall about 37% by 2029 — from 0.46 in 2024 to a central estimate of 0.29 (95% range 0.08–0.50). A 5-year backtest shows a typical error of ±24.5%, with 80% of held-out values landing inside the 95% band.19742029
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 →
20250.270.060.48
20260.270.060.48
20270.280.070.49
20280.280.070.50
20290.290.080.50

Brown Creeper Survey Routes in West Virginia

Routes recording Brown Creeper 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 →
Glade Run 2520242006
Bemis320242001
Denmar320241980
Green Bank320241999
Glade Run219991999
Ruthbelle220242007
Dailey120191974
Pedro120112011
Bowden120231995
Wymer120091995
Glady120242002
Meadowville120231997
Bismark120212021
Canaan120222016
Richwood120082008
Sugar Grove120192019

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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