BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Brown Creeper In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Brown Creeper in Southern Rockies / Colorado Plateau has surged: up 221% on the route-weighted index since 1974.

+221%Since 1974TrendPercent 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 →
76Routes 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 →
46YearsYears 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 Southern Rockies / Colorado Plateau. See the full index history below.

Brown Creeper In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Brown Creeper in Southern Rockies / Colorado Plateau is projected to fall about 23% by 2030 — from 0.15 in 2025 to a central estimate of 0.12 (95% range 0.03–0.20). A 5-year backtest shows a typical error of ±37.5%, with 100% of held-out values landing inside the 95% band.

-23%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 →
0.12Projected 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 →
0.03–0.2095% 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 →
±37.5%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 Southern Rockies / Colorado Plateau is projected to fall about 23% by 2030 — from 0.15 in 2025 to a central estimate of 0.12 (95% range 0.03–0.20). A 5-year backtest shows a typical error of ±37.5%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.110.030.19
20270.110.030.19
20280.110.030.20
20290.110.030.20
20300.120.030.20

Routes In Southern Rockies / Colorado Plateau

Routes recording Brown Creeper in Southern Rockies / Colorado Plateau.
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 →
ClaunchNEW-MEXICO71978
TsaileARIZONA52023
Mt. Taylor 2NEW-MEXICO52024
Grizzly RdgeUTAH52025
Wasatch NfUTAH42019
Pinos CreekCOLORADO31989
PowderhornCOLORADO32014
Owl Creek PassCOLORADO32015
SawmillARIZONA22005
Dry ParkARIZONA22025
AspenCOLORADO22023
ParlinCOLORADO22018
Pagosa SpgsCOLORADO21976
UncompahgreCOLORADO22014
RosevaleCOLORADO22017
PinonCOLORADO22025
CebollaNEW-MEXICO22005
Angel FireNEW-MEXICO22000
VallecitosNEW-MEXICO22024
GallinasNEW-MEXICO22017
Navajo LakeUTAH22025
FerronUTAH22025
AltonUTAH22001
Cheesman LkCOLORADO12015
DeltaCOLORADO12014

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