Species · California · BBS 2025 Release · 1966–2024
Canvasback Population Trend in California
Canvasback in California has held roughly steady: down 9% on the route-weighted index since 1974.
-9%Since 1974
9Routes In State
39Years
Notable Canvasback Trends in California
No notable trend signals for Canvasback in California. See the full index history below.
Canvasback Population Forecast in California
If the recent trend holds, Canvasback in California is projected to fall about 22% by 2022 — from 0.11 in 2017 to a central estimate of 0.08 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±101.3%, with 100% of held-out values landing inside the 95% band.
-22%Change by 2022
0.08Projected 2022 index
0.00–0.2295% range
±101.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2018 | 0.08 | 0.00 | 0.22 |
| 2019 | 0.08 | 0.00 | 0.22 |
| 2020 | 0.08 | 0.00 | 0.22 |
| 2021 | 0.08 | 0.00 | 0.22 |
| 2022 | 0.08 | 0.00 | 0.22 |
Canvasback Survey Routes in California
| Dorris | 14 | 2017 | 1973 |
| Likely | 10 | 2015 | 1973 |
| Ingalls | 7 | 1981 | 1981 |
| Macdoel | 3 | 1989 | 1987 |
| Tranquillity | 3 | 1972 | 1972 |
| Nubieber | 2 | 1985 | 1985 |
| Clear Lk Res | 2 | 1999 | 1999 |
| Tehama | 1 | 1984 | 1984 |
| Iron Gate | 1 | 1998 | 1998 |
Canvasback Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.