Species · BCR 4 · BBS 2025 Release · 1966–2024
Spruce Grouse In BCR 4
Spruce Grouse in BCR 4 has fallen sharply: down 66% on the route-weighted index since 1995.
-66%Since 1995
12Routes In Region
20Years
Notable Signals
long arc declinecomputed index
Spruce Grouse has fallen sharply in BCR 4: down 66% on the route-weighted index since 1995.
Forecast
If the recent trend holds, Spruce Grouse in BCR 4 is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±88.7%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.01Projected 2029 index
0.00–0.0895% range
±88.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.09 |
| 2026 | 0.01 | 0.00 | 0.09 |
| 2027 | 0.01 | 0.00 | 0.09 |
| 2028 | 0.01 | 0.00 | 0.08 |
| 2029 | 0.01 | 0.00 | 0.08 |
Routes In BCR 4
| Tatalina | ALASKA | 2 | 2012 |
| Circle | ALASKA | 1 | 1996 |
| Monahan | ALASKA | 1 | 2013 |
| Willow | ALASKA | 1 | 2000 |
| Savage | ALASKA | 1 | 2016 |
| Chena Hot Spring 2 | ALASKA | 1 | 2023 |
| Lake Louise | ALASKA | 1 | 2003 |
| Petersville | ALASKA | 1 | 1986 |
| Seven Lakes | ALASKA | 1 | 2022 |
| Mcgrath | ALASKA | 1 | 1998 |
| Ft. Richrdsn | ALASKA | 1 | 2008 |
| Mccarthy Rd2 | ALASKA | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.