BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Brown Creeper In Great Basin

All regionsGreat BasinForest birds

Brown Creeper in Great Basin has edged up: up 16% on the route-weighted index since 1970.

+16%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 →
64Routes 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 →
56YearsYears 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 rise about 38% by 2029 — from 0.31 in 2024 to a central estimate of 0.43 (95% range 0.21–0.66). A 5-year backtest shows a typical error of ±35.2%, with 100% of held-out values landing inside the 95% band.

+38%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 →
0.43Projected 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 →
0.21–0.6695% 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 →
±35.2%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 rise about 38% by 2029 — from 0.31 in 2024 to a central estimate of 0.43 (95% range 0.21–0.66). A 5-year backtest shows a typical error of ±35.2%, 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 →
20250.410.190.64
20260.420.200.64
20270.420.200.65
20280.430.210.65
20290.430.210.66

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 →
Barnes ValOREGON131987
Crowder FlatCALIFORNIA92019
GlacierWASHINGTON82024
KendallWASHINGTON62024
E. Mt. AdamsWASHINGTON62024
BartleCALIFORNIA52021
HackamoreCALIFORNIA42010
TionestaCALIFORNIA42021
Mt HoodOREGON42023
Davis LakeOREGON42023
Wizard FallsOREGON42024
Camp ShermanOREGON31996
LakeviewOREGON32024
RonaldWASHINGTON32024
Medicine Mtn.CALIFORNIA22015
HawthorneNEVADA22001
Dell SpringOREGON21990
PaisleyOREGON22018
Bald Mtn.OREGON22024
Picture FlatOREGON22024
SistersOREGON22024
RimrockWASHINGTON22023
White ChuckWASHINGTON22024
CarltonWASHINGTON22004
Suiattle RivWASHINGTON22019

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