BirdAnalyst
Species · BCR 32 · BBS 2025 Release · 1966–2024

Pied-billed Grebe In Coastal California

All regionsCoastal CaliforniaWetland birds

Pied-billed Grebe in Coastal California has edged down: down 14% on the route-weighted index since 1971.

-14%Since 1971
57Routes In Region
54Years

Notable Signals

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

Forecast

If the recent trend holds, Pied-billed Grebe in Coastal California is projected to fall about 29% by 2029 — from 0.36 in 2024 to a central estimate of 0.26 (95% range 0.00–0.57). A 5-year backtest shows a typical error of ±155.1%, with 100% of held-out values landing inside the 95% band.

-29%Change by 2029
0.26Projected 2029 index
0.00–0.5795% range
±155.1%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
20250.260.000.57
20260.260.000.57
20270.260.000.57
20280.260.000.57
20290.260.000.57

Routes In Coastal California

Routes recording Pied-billed Grebe in Coastal California.
Point ReyesCALIFORNIA102010
Staten Is.CALIFORNIA62024
JacumbaCALIFORNIA51995
JacksonCALIFORNIA51986
PenningtonCALIFORNIA32015
Harbor LakeCALIFORNIA31990
El ToroCALIFORNIA31980
VentucopaCALIFORNIA31997
CoyoteCALIFORNIA32024
Red BluffCALIFORNIA22011
ColmaCALIFORNIA21971
HughsonCALIFORNIA22024
Yokohl ValCALIFORNIA21993
CoalingaCALIFORNIA22001
Big BearCALIFORNIA21986
AuburnCALIFORNIA21980
OnoCALIFORNIA22009
Mesa GrandeCALIFORNIA21986
AdelaidaCALIFORNIA22015
Carrizo PlnCALIFORNIA21978
GlennCALIFORNIA22015
WestleyCALIFORNIA22006
OrovilleCALIFORNIA22010
OnealsCALIFORNIA22024
AthloneCALIFORNIA21989

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