Species · BCR 2 · BBS 2025 Release · 1966–2024
Arctic Warbler In BCR 2
Arctic Warbler in BCR 2 has declined: down 36% on the route-weighted index since 1994.
-36%Since 1994
14Routes In Region
31Years
Notable Signals
No notable trend signals for Arctic Warbler in BCR 2. See the full index history below.
Forecast
If the recent trend holds, Arctic Warbler in BCR 2 is projected to stay roughly flat through 2029, near 7.0 (95% range 0.00–16). A 5-year backtest shows a typical error of ±255%, with 60% of held-out values landing inside the 95% band.
-10%Change by 2029
7.0Projected 2029 index
0.00–1695% range
±255%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 7.8 | 0.00 | 17 |
| 2026 | 7.6 | 0.00 | 16 |
| 2027 | 7.4 | 0.00 | 16 |
| 2028 | 7.2 | 0.00 | 16 |
| 2029 | 7.0 | 0.00 | 16 |
Routes In BCR 2
| Goodnews Bay | ALASKA | 55 | 2005 |
| Salmon Lake | ALASKA | 52 | 2024 |
| Togiak River | ALASKA | 42 | 2005 |
| Nome | ALASKA | 36 | 2023 |
| Dillingham (Short) | ALASKA | 24 | 1984 |
| Council | ALASKA | 14 | 2024 |
| Dillingham | ALASKA | 11 | 2019 |
| Kanektok Riv | ALASKA | 11 | 2005 |
| St. Mary'S | ALASKA | 5 | 2014 |
| Teller | ALASKA | 4 | 2024 |
| Cape Nome | ALASKA | 3 | 2017 |
| Gweek River | ALASKA | 3 | 2001 |
| Katmai N.P. | ALASKA | 1 | 2013 |
| Kotzebue | ALASKA | 1 | 2022 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.