BirdAnalyst
Species · Montana · BBS 2025 Release · 1966–2024

Brown Creeper Population Trend in Montana

All statesForest birds

Brown Creeper in Montana has increased: up 36% on the route-weighted index since 1979.

+36%Since 1979TrendPercent 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 →
23Routes 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 →
35YearsYears 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 MontanaNotable 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 Brown Creeper in Montana. See the full index history below.

Brown Creeper Population Forecast in Montana

If the recent trend holds, Brown Creeper in Montana is projected to stay roughly flat through 2029, near 0.10 (95% range 0.02–0.19). A 5-year backtest shows a typical error of ±78.4%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.10Projected 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 →
0.02–0.1995% 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 →
±78.4%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 Montana is projected to stay roughly flat through 2029, near 0.10 (95% range 0.02–0.19). A 5-year backtest shows a typical error of ±78.4%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.100.010.19
20260.100.010.19
20270.100.010.19
20280.100.010.19
20290.100.020.19

Brown Creeper Survey Routes in Montana

Routes recording Brown Creeper in Montana.
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 →
Woodman320221970
Libby Dam219921992
Logan Pass220211992
Victor219981993
Threemile Wa220232005
Greenough220001996
Inside Road220232023
Elevation Mt120122012
Pryor Mtn.120182007
St Regis120241999
Arlee120131968
Clinton120022002
Elliston119941994
Sula120042004
Chestnut120131989
Whitefish Lake120232019
Skalkho-Rye120022002
Swan Lake120222016
Greenoagh 2120112005
Ninemile120242005
Skalkaho119941994
Wise River120072001
Noxon120232014

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotanebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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