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

Rock Wren Population Trend in California

All statesForest birds

Rock Wren in California has increased: up 46% on the route-weighted index since 1970.

+46%Since 1970
164Routes In State
56Years

Notable Rock Wren Trends in California

No notable trend signals for Rock Wren in California. See the full index history below.

Rock Wren Population Forecast in California

If the recent trend holds, Rock Wren in California is projected to fall about 47% by 2029 — from 2.2 in 2024 to a central estimate of 1.2 (95% range 0.17–2.2). A 5-year backtest shows a typical error of ±70.1%, with 80% of held-out values landing inside the 95% band.

-47%Change by 2029
1.2Projected 2029 index
0.17–2.295% range
±70.1%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
20251.20.172.1
20261.20.172.2
20271.20.172.2
20281.20.172.2
20291.20.172.2

Rock Wren Survey Routes in California

Routes recording Rock Wren in California.
Bodie3120241986
Big Pine2620241968
Dorris2420191972
Lake Hemet 22419941993
Eagle Lake2320241969
Eureka Val1520241973
Likely1520241974
Pine Mountain1120171997
White River1019921972
Kelso Valley920241973
Barstow819981968
Chilcoot820241998
Onyx720151968
Woodfords720241976
Pollock Pines720242022
Honey Lake620241973
Hat Creek620181998
Wildrose520221977
Pearblossom520241972
Iron Gate520191988
Pennington419761976
Moreno420241973
Oak Grove420241976
Benton420241975
Valyermo420191970

Rock Wren Population Trend in Other States

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