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

American Avocet Population Trend in California

All statesShorebirds

American Avocet in California has edged down: down 20% on the route-weighted index since 1972.

-20%Since 1972
49Routes In State
54Years

Notable American Avocet Trends in California

No notable trend signals for American Avocet in California. See the full index history below.

American Avocet Population Forecast in California

If the recent trend holds, American Avocet in California is projected to rise about 79% by 2029 — from 0.65 in 2024 to a central estimate of 1.2 (95% range 0.00–3.7). A 5-year backtest shows a typical error of ±230.6%, with 100% of held-out values landing inside the 95% band.

+79%Change by 2029
1.2Projected 2029 index
0.00–3.795% range
±230.6%Backtest error
19702029
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
20251.20.003.7
20261.20.003.7
20271.20.003.7
20281.20.003.7
20291.20.003.7

American Avocet Survey Routes in California

Routes recording American Avocet in California.
Benton3820241974
Oilfields3619981970
Likely1820241988
Hollister1320071991
Haiwee Res1220051976
Carrizo Pln920231978
Big Bear919731973
Hughson720231983
Moreno719861986
Clear Lk Res720181972
Goumaz620101997
Niland620221973
Nubieber520141971
Cordova419771974
Crowley Lake420141974
Crowder Flat420092009
Macdoel420191983
Tranquillity420001972
Zamora419881975
Arvin319961973
Collegeville319851985
Tres Pinos320031995
Dorris320191972
Maricopa319901990
Pennington219891973

American Avocet Population Trend in Other States

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