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

Brown Creeper Population Trend in Washington

All statesForest birds

Brown Creeper in Washington has surged: up 402% on the route-weighted index since 1971.

+402%Since 1971
68Routes In State
55Years

Notable Brown Creeper Trends in Washington

long arc increasecomputed index

Brown Creeper has surged in Washington: up 402% on the route-weighted index since 1971.

Brown Creeper Population Forecast in Washington

If the recent trend holds, Brown Creeper in Washington is projected to fall about 14% by 2029 — from 1.5 in 2024 to a central estimate of 1.3 (95% range 0.95–1.7). A 5-year backtest shows a typical error of ±18.7%, with 60% of held-out values landing inside the 95% band.

-14%Change by 2029
1.3Projected 2029 index
0.95–1.795% range
±18.7%Backtest error
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 index95% low95% high
20251.20.861.6
20261.20.881.6
20271.30.911.6
20281.30.931.7
20291.30.951.7

Brown Creeper Survey Routes in Washington

Routes recording Brown Creeper in Washington.
Vashon Is.1220241997
Deception820181995
Glacier820241979
Carnation820241989
Cougar620231985
E. Mt. Adams620241996
Kendall620241981
Rainier620191993
Bunker Hill520241969
Raymond 2520242022
Neilton419751975
Omak Creek420242007
Deer Park420082001
Greenwater420242016
Ronald320241973
Cedar Falls320141996
Mt St Helens320242002
Mt Rainier320151993
Mendota 3320242005
Port Angeles220231974
Warm Beach220161969
Montesand220242004
Issaquah219871969
Rimrock220231969
Mcchord220151996

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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