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

Brown Creeper Population Trend in Wyoming

All statesForest birds

Brown Creeper in Wyoming has declined: down 34% on the route-weighted index since 1991.

-34%Since 1991TrendPercent 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 →
14Routes 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 →
22YearsYears 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 WyomingNotable 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 Wyoming. See the full index history below.

Brown Creeper Population Forecast in Wyoming

If the recent trend holds, Brown Creeper in Wyoming is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±92%, 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 →
0.02Projected 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 →
0.00–0.0895% 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 →
±92%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 Wyoming is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±92%, with 100% of held-out values landing inside the 95% band.19892029
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 →
20250.030.000.08
20260.030.000.08
20270.020.000.08
20280.020.000.08
20290.020.000.08

Brown Creeper Survey Routes in Wyoming

Routes recording Brown Creeper in Wyoming.
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 →
Colter Bay 2220212019
Hunter Peak120081996
Yellowstone120141991
Colter Bay119991989
Bald Mtn120242022
Crazy Woman119951995
Fox Park120002000
Ryan Park120151993
Moran120152002
Brookhurst120052005
Horse Creek120032003
Fletcher Pk120042004
Savery119891989
Mammoth120241993

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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