Species · California · BBS 2025 Release · 1966–2024
Long-billed Curlew Population Trend in California
Long-billed Curlew in California has collapsed: down 95% on the route-weighted index since 1972.
-95%Since 1972
22Routes In State
53Years
Notable Long-billed Curlew Trends in California
long arc declinecomputed index
Long-billed Curlew has collapsed in California: down 95% on the route-weighted index since 1972.
Long-billed Curlew Population Forecast in California
If the recent trend holds, Long-billed Curlew in California is projected to stay roughly flat through 2028, near 0.10 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±540.3%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.10Projected 2028 index
0.00–0.4695% range
±540.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.11 | 0.00 | 0.46 |
| 2025 | 0.11 | 0.00 | 0.46 |
| 2026 | 0.11 | 0.00 | 0.46 |
| 2027 | 0.10 | 0.00 | 0.46 |
| 2028 | 0.10 | 0.00 | 0.46 |
Long-billed Curlew Survey Routes in California
| Athlone | 22 | 1972 | 1972 |
| Atwater | 12 | 2007 | 1971 |
| Cedarville | 8 | 2019 | 1974 |
| Riovista | 5 | 1971 | 1971 |
| Ora Loma | 4 | 1976 | 1976 |
| Honey Lake | 3 | 2019 | 1972 |
| Glenn | 2 | 2005 | 1991 |
| Caruthers | 2 | 1984 | 1984 |
| Dorris | 2 | 2019 | 1972 |
| Nubieber | 1 | 2018 | 1980 |
| Likely | 1 | 2018 | 1971 |
| Madeline | 1 | 2021 | 2014 |
| Crowley Lake | 1 | 2022 | 2013 |
| Westley | 1 | 1992 | 1992 |
| Haiwee Res | 1 | 1998 | 1998 |
| Parkfield | 1 | 1970 | 1970 |
| Davis Creek | 1 | 2023 | 1972 |
| Macdoel | 1 | 1993 | 1993 |
| Tranquillity | 1 | 2000 | 1984 |
| Yreka | 1 | 2009 | 2009 |
| Ingalls | 1 | 1995 | 1995 |
| Ravendale | 1 | 2000 | 1976 |
Long-billed Curlew Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.