Species · Washington · BBS 2025 Release · 1966–2024
Western Gull Population Trend in Washington
Western Gull in Washington has collapsed: down 94% on the route-weighted index since 1971.
-94%Since 1971
6Routes In State
38Years
Notable Western Gull Trends in Washington
long arc declinecomputed index
Western Gull has collapsed in Washington: down 94% on the route-weighted index since 1971.
Western Gull Population Forecast in Washington
If the recent trend holds, Western Gull in Washington is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–3.6). A 5-year backtest shows a typical error of ±1589%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–3.695% range
±1589%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 3.6 |
| 2026 | 0.00 | 0.00 | 3.6 |
| 2027 | 0.00 | 0.00 | 3.6 |
| 2028 | 0.00 | 0.00 | 3.6 |
| 2029 | 0.00 | 0.00 | 3.6 |
Western Gull Survey Routes in Washington
| Taholah | 47 | 2022 | 1969 |
| Warm Beach | 1 | 1993 | 1989 |
| Ilwaco | 1 | 2023 | 1975 |
| Bunker Hill | 1 | 1989 | 1989 |
| Raymond | 1 | 2013 | 2008 |
| Raymond 2 | 1 | 2024 | 2024 |
Western Gull Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.