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Species · California · BBS 2025 Release · 1966–2024

Chestnut-backed Chickadee Population Trend in California

All statesForest birds

Chestnut-backed Chickadee in California has declined: down 46% on the route-weighted index since 1970.

-46%Since 1970
75Routes In State
56Years

Notable Chestnut-backed Chickadee Trends in California

No notable trend signals for Chestnut-backed Chickadee in California. See the full index history below.

Chestnut-backed Chickadee Population Forecast in California

If the recent trend holds, Chestnut-backed Chickadee in California is projected to fall about 12% by 2029 — from 2.7 in 2024 to a central estimate of 2.4 (95% range 0.51–4.2). A 5-year backtest shows a typical error of ±18.6%, with 100% of held-out values landing inside the 95% band.

-12%Change by 2029
2.4Projected 2029 index
0.51–4.295% range
±18.6%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
20252.40.554.2
20262.40.544.2
20272.40.534.2
20282.40.524.2
20292.40.514.2

Chestnut-backed Chickadee Survey Routes in California

Routes recording Chestnut-backed Chickadee in California.
Colma10719721968
Crescent Cty3620241972
Waterman Gap3220241972
Fairfax3020241972
Holmes2820241968
Moraga2720241972
Redwood N.P. 22620132012
Fish Rock2520141968
Creston1819831983
Glen Ellen1620041972
Alderpoint1520121974
Point Reyes1520231970
Pescadero1420241992
Coyote1120241972
Korbel1120241972
Shasta Lake1120241976
Honeydew1020171968
Laytonville1020241972
Pilot Creek919961995
Carmel Val920241974
Redwood N.P.820101995
Mark West820241975
Friday Ridge820241994
Rio Dell720121972
Ukiah620111988

Chestnut-backed Chickadee Population Trend in Other States

alaskaidahomontanaoregonwashington

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