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

Clark's Grebe In Coastal California

All regionsCoastal CaliforniaWetland birds

Clark's Grebe in Coastal California has surged: up 107% on the route-weighted index since 1988.

+107%Since 1988
13Routes In Region
37Years

Notable Signals

long arc increasecomputed index

Clark's Grebe has surged in Coastal California: up 107% on the route-weighted index since 1988.

Forecast

If the recent trend holds, Clark's Grebe in Coastal California is projected to stay roughly flat through 2029, near 0.22 (95% range 0.02–0.42). A 5-year backtest shows a typical error of ±89.8%, with 80% of held-out values landing inside the 95% band.

+3%Change by 2029
0.22Projected 2029 index
0.02–0.4295% range
±89.8%Backtest error
19862029
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
20250.200.010.40
20260.210.010.41
20270.210.010.41
20280.210.020.41
20290.220.020.42

Routes In Coastal California

Routes recording Clark's Grebe in Coastal California.
Buena VistaCALIFORNIA62019
Lake BerryessaCALIFORNIA42024
CoyoteCALIFORNIA42024
San YsidroCALIFORNIA31991
HughsonCALIFORNIA22024
MoragaCALIFORNIA22010
Bartlett SpsCALIFORNIA22015
Foster ParkCALIFORNIA11993
HollisterCALIFORNIA12001
FolsomCALIFORNIA11987
CopperopolisCALIFORNIA12021
Ora LomaCALIFORNIA12023
Staten Is.CALIFORNIA12010

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