Species · BCR 4 · BBS 2025 Release · 1966–2024
Great Gray Owl In BCR 4
Great Gray Owl in BCR 4 has increased: up 35% on the route-weighted index since 1996.
+35%Since 1996
10Routes In Region
19Years
Notable Signals
No notable trend signals for Great Gray Owl in BCR 4. See the full index history below.
Forecast
If the recent trend holds, Great Gray Owl in BCR 4 is projected to stay roughly flat through 2029, near 0.04 (95% range 0.01–0.08). A 5-year backtest shows a typical error of ±40.8%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.04Projected 2029 index
0.01–0.0895% range
±40.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.04 | 0.00 | 0.08 |
| 2026 | 0.04 | 0.00 | 0.08 |
| 2027 | 0.04 | 0.00 | 0.08 |
| 2028 | 0.04 | 0.00 | 0.08 |
| 2029 | 0.04 | 0.01 | 0.08 |
Routes In BCR 4
| Eagle | ALASKA | 1 | 2024 |
| Circle | ALASKA | 1 | 2022 |
| Lake Louise | ALASKA | 1 | 1998 |
| Nicholai Sl | ALASKA | 1 | 2021 |
| Hather Creek | ALASKA | 1 | 1994 |
| Mud River | ALASKA | 1 | 2019 |
| Tatalina | ALASKA | 1 | 2001 |
| Kanuti Lake | ALASKA | 1 | 2021 |
| Nabesna Road | ALASKA | 1 | 2011 |
| Kuskulana | ALASKA | 1 | 1998 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.