Species · Alaska · BBS 2025 Release · 1966–2024
Bonaparte's Gull Population Trend in Alaska
Bonaparte's Gull in Alaska has collapsed: down 79% on the route-weighted index since 1984.
-79%Since 1984
53Routes In State
42Years
Notable Bonaparte's Gull Trends in Alaska
long arc declinecomputed index
Bonaparte's Gull has collapsed in Alaska: down 79% on the route-weighted index since 1984.
Bonaparte's Gull Population Forecast in Alaska
If the recent trend holds, Bonaparte's Gull in Alaska is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–5.5). A 5-year backtest shows a typical error of ±1753.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–5.595% range
±1753.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 5.5 |
| 2026 | 0.00 | 0.00 | 5.5 |
| 2027 | 0.00 | 0.00 | 5.5 |
| 2028 | 0.00 | 0.00 | 5.5 |
| 2029 | 0.00 | 0.00 | 5.5 |
Bonaparte's Gull Survey Routes in Alaska
| Juneau Alt | 335 | 1985 | 1985 |
| Ketchikan | 55 | 2017 | 1989 |
| Petersburg | 24 | 1987 | 1987 |
| Zarembo | 20 | 2001 | 2001 |
| Bear Creek | 8 | 1988 | 1988 |
| Nabesna Road | 5 | 2016 | 2004 |
| Petersville | 5 | 1997 | 1986 |
| Kuskulana | 4 | 1992 | 1992 |
| Anvik River | 4 | 2014 | 1998 |
| Sourdough | 4 | 2001 | 1983 |
| Zimovia Strt | 4 | 2017 | 1999 |
| Slana | 3 | 2013 | 1994 |
| Monahan | 3 | 2016 | 1983 |
| Cottonwood | 3 | 1990 | 1990 |
| Mitkof Isle | 3 | 2010 | 1990 |
| Yakutat | 3 | 2018 | 1997 |
| Chiniak | 2 | 2021 | 2019 |
| Chistochina | 2 | 1993 | 1990 |
| Kuiu Island | 2 | 2010 | 2010 |
| Haines | 2 | 1997 | 1995 |
| Skagway | 2 | 2011 | 1995 |
| Pinoche Tral (Short) | 2 | 1984 | 1984 |
| Togiak River | 2 | 2003 | 2003 |
| Sheep Mtn | 2 | 2017 | 1984 |
| Paxson Lake | 1 | 1993 | 1993 |
Bonaparte's Gull Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.