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

Gadwall In Coastal California

All regionsCoastal CaliforniaWaterfowl

Gadwall in Coastal California has increased: up 43% on the route-weighted index since 1976.

+43%Since 1976
30Routes In Region
44Years

Notable Signals

No notable trend signals for Gadwall in Coastal California. See the full index history below.

Forecast

If the recent trend holds, Gadwall in Coastal California is projected to fall about 11% by 2029 — from 0.21 in 2024 to a central estimate of 0.19 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±845.1%, with 100% of held-out values landing inside the 95% band.

-11%Change by 2029
0.19Projected 2029 index
0.00–0.6395% range
±845.1%Backtest error
19732029
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
20250.200.000.64
20260.200.000.64
20270.190.000.64
20280.190.000.63
20290.190.000.63

Routes In Coastal California

Routes recording Gadwall in Coastal California.
JacumbaCALIFORNIA201988
PolomaCALIFORNIA152013
Big BearCALIFORNIA111986
Mesa GrandeCALIFORNIA61998
Cp. PendletonCALIFORNIA51991
GlennCALIFORNIA42007
LockwoodCALIFORNIA42024
Ora LomaCALIFORNIA42024
Tres PinosCALIFORNIA32002
Buena VistaCALIFORNIA32017
PenningtonCALIFORNIA22009
HughsonCALIFORNIA22024
CoalingaCALIFORNIA22000
Point ReyesCALIFORNIA22007
Lake BerryessaCALIFORNIA22023
WestleyCALIFORNIA22018
TranquillityCALIFORNIA22000
CopperopolisCALIFORNIA22013
Staten Is.CALIFORNIA22015
OrlandCALIFORNIA12009
FairfaxCALIFORNIA12010
AdelaidaCALIFORNIA11995
Green ValleyCALIFORNIA11988
ArvinCALIFORNIA12015
AtwaterCALIFORNIA12004

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