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

Peregrine Falcon Population Trend in California

All statesGeneralists

Peregrine Falcon in California has edged up: up 17% on the route-weighted index since 1975.

+17%Since 1975
41Routes In State
40Years

Notable Peregrine Falcon Trends in California

No notable trend signals for Peregrine Falcon in California. See the full index history below.

Peregrine Falcon Population Forecast in California

If the recent trend holds, Peregrine Falcon in California is projected to stay roughly flat through 2029, near 0.04 (95% range 0.01–0.08). A 5-year backtest shows a typical error of ±107.5%, with 60% of held-out values landing inside the 95% band.

n/aChange by 2029
0.04Projected 2029 index
0.01–0.0895% range
±107.5%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
20250.040.000.08
20260.040.000.08
20270.040.000.08
20280.040.010.08
20290.040.010.08

Peregrine Falcon Survey Routes in California

Routes recording Peregrine Falcon in California.
Bodega Bay420211977
Cedarville220242024
Benton220192019
Crescent Cty120222017
Honeydew119691969
Iron Gate120182018
Hullville120172017
Orleans 2120142014
Glenn120152015
Hughson120241970
Atwater120122012
Brawley120122012
Gold Hill120112011
Crowley Lake120192014
Tuolumne Grove120112011
Sattley120082008
Longvale120212000
Forest Hill120182018
Calif City119781978
Dorris119951989
Orleans120111975
Clear Lk Res119961996
Alderpoint119851985
Yolla Bolly120182018
Morro Bay120122012

Peregrine Falcon Population Trend in Other States

alabamaalaskaarizonacoloradoconnecticutdelawareidahoindianamainemarylandmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorkoklahomaoregonpennsylvaniatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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