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

Pied-billed Grebe Population Trend in California

All statesWetland birds

Pied-billed Grebe in California has held roughly steady: up 3% on the route-weighted index since 1971.

+3%Since 1971
97Routes In State
55Years

Notable Pied-billed Grebe Trends in California

No notable trend signals for Pied-billed Grebe in California. See the full index history below.

Pied-billed Grebe Population Forecast in California

If the recent trend holds, Pied-billed Grebe in California is projected to stay roughly flat through 2029, near 0.22 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±147.9%, with 100% of held-out values landing inside the 95% band.

+1%Change by 2029
0.22Projected 2029 index
0.00–0.4595% range
±147.9%Backtest error
19692029
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
20250.220.000.45
20260.220.000.45
20270.220.000.45
20280.220.000.45
20290.220.000.45

Pied-billed Grebe Survey Routes in California

Routes recording Pied-billed Grebe in California.
Crowder Flat1220182003
Point Reyes1020101997
Staten Is.620241994
Ingalls519941979
Jacumba519951986
Jackson519861972
Dorris520191976
Pennington320151979
Harbor Lake319901974
El Toro319801980
Ventucopa319971989
Coyote320241972
Red Bluff220111981
Hullville219961974
Colma219711970
Hughson220241970
Yokohl Val219931993
Coalinga220011978
Big Bear219861969
Auburn219801975
Ono220091997
Mesa Grande219861986
Adelaida220151989
Carrizo Pln219781978
Glenn220151975

Pied-billed Grebe Population Trend in Other States

alabamaalaskaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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