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

Redhead Population Trend in California

All statesWaterfowl

Redhead in California has surged: up 122% on the route-weighted index since 1972.

+122%Since 1972
22Routes In State
50Years

Notable Redhead Trends in California

long arc increasecomputed index

Redhead has surged in California: up 122% on the route-weighted index since 1972.

Redhead Population Forecast in California

If the recent trend holds, Redhead in California is projected to rise about 13× by 2029 — from 0.05 in 2024 to a central estimate of 0.70 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±413.5%, with 100% of held-out values landing inside the 95% band.

13×Change by 2029
0.70Projected 2029 index
0.00–1.795% range
±413.5%Backtest error
19702029
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
20250.690.001.7
20260.700.001.7
20270.700.001.7
20280.700.001.7
20290.700.001.7

Redhead Survey Routes in California

Routes recording Redhead in California.
Dorris5620191972
Niland3020101992
Big Bear2019811971
Glenn1020002000
Madeline1020182018
Crowder Flat820022002
Macdoel419981987
Tranquillity319971973
Hughson220172010
Likely220241990
Sattley219741974
Honey Lake220171994
Clear Lk Res220011972
Cedarville220191994
Yreka219931984
Benton220241979
Buena Vista219961996
Nubieber120181970
Gold Hill120072007
Davis Creek120102010
Ora Loma120242024
Ingalls119971984

Redhead Population Trend in Other States

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