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

Brown Creeper Population Trend in California

All statesForest birds

Brown Creeper in California has surged: up 308% on the route-weighted index since 1970.

+308%Since 1970
129Routes In State
56Years

Notable Brown Creeper Trends in California

long arc increasecomputed index

Brown Creeper has surged in California: up 308% on the route-weighted index since 1970.

Brown Creeper Population Forecast in California

If the recent trend holds, Brown Creeper in California is projected to rise about 13% by 2029 — from 1.7 in 2024 to a central estimate of 1.9 (95% range 1.4–2.4). A 5-year backtest shows a typical error of ±27.1%, with 60% of held-out values landing inside the 95% band.

+13%Change by 2029
1.9Projected 2029 index
1.4–2.495% range
±27.1%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
20251.81.32.4
20261.91.32.4
20271.91.42.4
20281.91.42.4
20291.91.42.4

Brown Creeper Survey Routes in California

Routes recording Brown Creeper in California.
Lumberyard2020241976
Holmes1820241969
Westville1520241971
Last Chance1520191994
Lassen Park1319891972
Eagle Lake1320241970
Greenhorn Mt1220081971
Whiskeytown920132002
Crowder Flat920192002
Placerville920241997
Fish Rock820141968
Fairfax820241972
Butte Meadow820141972
Waterman Gap820241972
Lakeshore820241972
Coulterville820191997
Chilcoot720241998
Downieville620241975
Point Reyes520231970
Tuolumne Grove520241972
Offield Mtn520141977
Riverton520231973
Bartle520211972
Tahoe Nf519941993
Meadow Valley520241999

Brown Creeper Population Trend in Other States

alaskaarizonacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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