Species · Washington · BBS 2025 Release · 1966–2024
Red-necked Grebe Population Trend in Washington
Red-necked Grebe in Washington has fallen sharply: down 72% on the route-weighted index since 1985.
-72%Since 1985
7Routes In State
22Years
Notable Red-necked Grebe Trends in Washington
long arc declinecomputed index
Red-necked Grebe has fallen sharply in Washington: down 72% on the route-weighted index since 1985.
Red-necked Grebe Population Forecast in Washington
If the recent trend holds, Red-necked Grebe in Washington is projected to stay roughly flat through 2014, near 0.00 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±62.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2014
0.00Projected 2014 index
0.00–0.0595% range
±62.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2010 | 0.01 | 0.00 | 0.06 |
| 2011 | 0.01 | 0.00 | 0.05 |
| 2012 | 0.01 | 0.00 | 0.05 |
| 2013 | 0.00 | 0.00 | 0.05 |
| 2014 | 0.00 | 0.00 | 0.05 |
Red-necked Grebe Survey Routes in Washington
| Sullivan Lk | 3 | 1999 | 1999 |
| Cusick | 1 | 2008 | 1988 |
| L Pend O Nwr | 1 | 2001 | 1998 |
| Nighthawk | 1 | 1993 | 1993 |
| Curlew | 1 | 1994 | 1992 |
| Sullivan Lake 2 | 1 | 2008 | 2001 |
| Twin Lakes | 1 | 2009 | 1983 |
Red-necked Grebe Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.