Species · BCR 2 · BBS 2025 Release · 1966–2024
Glaucous-winged Gull In BCR 2
Glaucous-winged Gull in BCR 2 has fallen sharply: down 75% on the route-weighted index since 1985.
-75%Since 1985
17Routes In Region
41Years
Notable Signals
long arc declinecomputed index
Glaucous-winged Gull has fallen sharply in BCR 2: down 75% on the route-weighted index since 1985.
Forecast
If the recent trend holds, Glaucous-winged Gull in BCR 2 is projected to fall about 100% by 2029 — from 8.6 in 2024 to a central estimate of 0.00 (95% range 0.00–31). A 5-year backtest shows a typical error of ±194%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–3195% range
±194%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 31 |
| 2026 | 0.00 | 0.00 | 31 |
| 2027 | 0.00 | 0.00 | 31 |
| 2028 | 0.00 | 0.00 | 31 |
| 2029 | 0.00 | 0.00 | 31 |
Routes In BCR 2
| Cape Nome | ALASKA | 63 | 2024 |
| Kodiak 2 | ALASKA | 46 | 2023 |
| Cold Bay (Short) | ALASKA | 28 | 1992 |
| Dillingham | ALASKA | 20 | 2017 |
| Kodiak | ALASKA | 11 | 1984 |
| Togiak River | ALASKA | 11 | 2005 |
| King Salmon | ALASKA | 8 | 2024 |
| Goodnews Bay | ALASKA | 8 | 2005 |
| Dillingham (Short) | ALASKA | 7 | 1984 |
| Salmon Lake | ALASKA | 5 | 2024 |
| Council | ALASKA | 4 | 2023 |
| Kanektok Riv | ALASKA | 2 | 2005 |
| Katmai N.P. | ALASKA | 1 | 2022 |
| Chiniak | ALASKA | 1 | 2023 |
| Cold Bay | ALASKA | 1 | 2024 |
| Gweek River | ALASKA | 1 | 2000 |
| Tupuknuk | ALASKA | 1 | 1995 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.