BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Brown Creeper In Great Basin

All regionsGreat BasinForest birds

Brown Creeper in Great Basin has increased: up 40% on the route-weighted index since 1970.

+40%Since 1970TrendPercent 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 →
65Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Great Basin. See the full index history below.

Brown Creeper In Great Basin Population Forecast

If the recent trend holds, Brown Creeper in Great Basin is projected to stay roughly flat through 2030, near 0.44 (95% range 0.22–0.66). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.

-8%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 →
0.44Projected 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 →
0.22–0.6695% 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 →
±32.1%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 Great Basin is projected to stay roughly flat through 2030, near 0.44 (95% range 0.22–0.66). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.420.200.65
20270.430.210.65
20280.430.210.65
20290.440.220.66
20300.440.220.66

Routes In Great Basin

Routes recording Brown Creeper in Great Basin.
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 →
KendallWASHINGTON192025
Barnes ValOREGON131987
Crowder FlatCALIFORNIA92019
GlacierWASHINGTON82024
E. Mt. AdamsWASHINGTON62025
BartleCALIFORNIA52021
Picture FlatOREGON52025
HackamoreCALIFORNIA42010
TionestaCALIFORNIA42021
Bald Mtn.OREGON42025
Mt HoodOREGON32025
Camp ShermanOREGON31996
Lapham Res.OREGON32025
Wizard FallsOREGON32025
LakeviewOREGON32025
RimrockWASHINGTON32025
Medicine Mtn.CALIFORNIA22015
HawthorneNEVADA22001
Dell SpringOREGON21990
PaisleyOREGON22018
SistersOREGON22025
PauninaOREGON22025
SnowdenWASHINGTON22025
RonaldWASHINGTON22025
White ChuckWASHINGTON22025

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