Species · BCR 4 · BBS 2025 Release · 1966–2024
Sharp-shinned Hawk In BCR 4
Sharp-shinned Hawk in BCR 4 has collapsed: down 80% on the route-weighted index since 1989.
-80%Since 1989
16Routes In Region
19Years
Notable Signals
long arc declinecomputed index
Sharp-shinned Hawk has collapsed in BCR 4: down 80% on the route-weighted index since 1989.
Forecast
If the recent trend holds, Sharp-shinned Hawk in BCR 4 is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±164.6%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.0795% range
±164.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.07 |
| 2025 | 0.00 | 0.00 | 0.07 |
| 2026 | 0.00 | 0.00 | 0.07 |
| 2027 | 0.00 | 0.00 | 0.07 |
| 2028 | 0.00 | 0.00 | 0.07 |
Routes In BCR 4
| Mud River | ALASKA | 2 | 1997 |
| Chatanika R | ALASKA | 1 | 2007 |
| Livengood | ALASKA | 1 | 2016 |
| Chistochina | ALASKA | 1 | 1992 |
| Kalifonsky | ALASKA | 1 | 2023 |
| Kenny Lake | ALASKA | 1 | 1996 |
| Sourdough | ALASKA | 1 | 2013 |
| Swan Lake Rd | ALASKA | 1 | 1984 |
| Anchor River | ALASKA | 1 | 2014 |
| Lake Louise | ALASKA | 1 | 2009 |
| Kachemak | ALASKA | 1 | 2014 |
| Coldfoot | ALASKA | 1 | 2018 |
| Donelly Dome | ALASKA | 1 | 2012 |
| Murphy Dome | ALASKA | 1 | 1996 |
| Anvik River | ALASKA | 1 | 2014 |
| Galena (Short) | ALASKA | 1 | 2015 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.