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Species · California · BBS 2025 Release · 1966–2024

California Scrub-Jay Population Trend in California

All statesGeneralists

California Scrub-Jay in California has edged down: down 17% on the route-weighted index since 1970.

-17%Since 1970
200Routes In State
56Years

Notable California Scrub-Jay Trends in California

No notable trend signals for California Scrub-Jay in California. See the full index history below.

California Scrub-Jay Population Forecast in California

If the recent trend holds, California Scrub-Jay in California is projected to stay roughly flat through 2029, near 9.6 (95% range 7.1–12). A 5-year backtest shows a typical error of ±6.1%, with 100% of held-out values landing inside the 95% band.

-6%Change by 2029
9.6Projected 2029 index
7.1–1295% range
±6.1%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
20259.87.312
20269.87.312
20279.77.212
20289.77.112
20299.67.112

California Scrub-Jay Survey Routes in California

Routes recording California Scrub-Jay in California.
Colma11519721968
Auburn7319801969
Jacumba7120241973
Gravesboro6119951968
White River6119921972
Elsinore Mtn5520241970
Sisquoc5320141970
Lake Cachuma4820161972
Cuyamaca Pk4720241970
Tres Pinos 24620112005
Anza 24420242005
Kernville4420082008
Mt Laguna4319871970
Rumsey4220081969
Santa Ynez4020191969
Coalinga4020221973
Silver City3920131972
Lockwood Val3920191970
Alderpoint3820121974
Anza3520041970
Hughson3320241968
Bass Lake3320191972
Lake Berryessa3320242023
Mt Pinos 23320242005
Tehama3320221973

California Scrub-Jay Population Trend in Other States

nevadaoregonwashington

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