Species · California · BBS 2025 Release · 1966–2024
Willet Population Trend in California
Willet in California has declined: down 43% on the route-weighted index since 1974.
-43%Since 1974
24Routes In State
52Years
Notable Willet Trends in California
No notable trend signals for Willet in California. See the full index history below.
Willet Population Forecast in California
If the recent trend holds, Willet in California is projected to rise about 183% by 2029 — from 0.41 in 2024 to a central estimate of 1.2 (95% range 0.39–1.9). A 5-year backtest shows a typical error of ±197.7%, with 20% of held-out values landing inside the 95% band.
+183%Change by 2029
1.2Projected 2029 index
0.39–1.995% range
±197.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.1 | 0.37 | 1.9 |
| 2026 | 1.1 | 0.37 | 1.9 |
| 2027 | 1.1 | 0.38 | 1.9 |
| 2028 | 1.2 | 0.39 | 1.9 |
| 2029 | 1.2 | 0.39 | 1.9 |
Willet Survey Routes in California
| Dorris | 50 | 2019 | 1972 |
| Cedarville | 22 | 2019 | 1974 |
| Sattley | 17 | 2017 | 1972 |
| Davis Creek | 15 | 2024 | 1972 |
| Macdoel | 15 | 2019 | 1973 |
| Madeline | 12 | 2024 | 1997 |
| Ingalls | 8 | 1999 | 1973 |
| Poway | 8 | 1973 | 1973 |
| Clear Lk Res | 7 | 2018 | 1975 |
| Goumaz | 5 | 2011 | 1997 |
| Benton | 5 | 2024 | 1979 |
| Eagle Lake | 2 | 2024 | 1975 |
| Hackamore | 2 | 2009 | 2009 |
| Crowder Flat | 2 | 2019 | 2002 |
| Honey Lake | 2 | 2024 | 1972 |
| Nubieber | 1 | 2018 | 1975 |
| Iron Gate | 1 | 1991 | 1991 |
| Likely | 1 | 2024 | 1974 |
| Crowley Lake | 1 | 2024 | 1973 |
| Fall River Mills | 1 | 2006 | 2006 |
| Morro Bay | 1 | 1992 | 1992 |
| Yreka | 1 | 2002 | 1974 |
| Hat Creek | 1 | 1987 | 1987 |
| Ravendale | 1 | 2007 | 1974 |
Willet Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.