Species · Washington · BBS 2025 Release · 1966–2024
Long-billed Curlew Population Trend in Washington
Long-billed Curlew in Washington has collapsed: down 85% on the route-weighted index since 1976.
-85%Since 1976
24Routes In State
49Years
Notable Long-billed Curlew Trends in Washington
long arc declinecomputed index
Long-billed Curlew has collapsed in Washington: down 85% on the route-weighted index since 1976.
Long-billed Curlew Population Forecast in Washington
If the recent trend holds, Long-billed Curlew in Washington is projected to stay roughly flat through 2029, near 0.16 (95% range 0.00–0.60). A 5-year backtest shows a typical error of ±415.8%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.16Projected 2029 index
0.00–0.6095% range
±415.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.18 | 0.00 | 0.62 |
| 2026 | 0.18 | 0.00 | 0.61 |
| 2027 | 0.17 | 0.00 | 0.61 |
| 2028 | 0.17 | 0.00 | 0.60 |
| 2029 | 0.16 | 0.00 | 0.60 |
Long-billed Curlew Survey Routes in Washington
| Hanford Site | 8 | 1994 | 1988 |
| Richland | 6 | 2022 | 2006 |
| Columbia Nwr | 3 | 2019 | 1992 |
| Othello | 3 | 1991 | 1984 |
| Mercer | 2 | 2016 | 1987 |
| Connell | 2 | 2010 | 1989 |
| Quincy | 2 | 2024 | 1981 |
| Scootney Reservoir | 2 | 2010 | 2009 |
| Horn Rapids | 2 | 2022 | 2005 |
| Harwood | 2 | 1997 | 1993 |
| Potholes | 2 | 2023 | 2009 |
| Arid Land Er | 1 | 1989 | 1988 |
| Brewster | 1 | 2002 | 1979 |
| Moses Lake | 1 | 2022 | 1973 |
| Harrington | 1 | 2005 | 1999 |
| Wapato | 1 | 1994 | 1989 |
| Asotin | 1 | 1982 | 1982 |
| Bickleton | 1 | 1987 | 1982 |
| Tonasket | 1 | 1997 | 1985 |
| Wilbur | 1 | 2002 | 1983 |
| Hartline | 1 | 2002 | 1995 |
| Keystone | 1 | 2018 | 1994 |
| Yakima | 1 | 2018 | 2018 |
| Mesa | 1 | 2005 | 1994 |
Long-billed Curlew Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.