Species · BCR 4 · BBS 2025 Release · 1966–2024
Red-breasted Nuthatch In BCR 4
Red-breasted Nuthatch in BCR 4 has surged: up 587% on the route-weighted index since 1994.
+587%Since 1994
23Routes In Region
32Years
Notable Signals
long arc increasecomputed index
Red-breasted Nuthatch has surged in BCR 4: up 587% on the route-weighted index since 1994.
Forecast
If the recent trend holds, Red-breasted Nuthatch in BCR 4 is projected to stay roughly flat through 2029, near 0.52 (95% range 0.18–0.86). A 5-year backtest shows a typical error of ±30.8%, with 100% of held-out values landing inside the 95% band.
-2%Change by 2029
0.52Projected 2029 index
0.18–0.8695% range
±30.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.48 | 0.15 | 0.82 |
| 2026 | 0.49 | 0.15 | 0.83 |
| 2027 | 0.50 | 0.16 | 0.84 |
| 2028 | 0.51 | 0.17 | 0.85 |
| 2029 | 0.52 | 0.18 | 0.86 |
Routes In BCR 4
| Kalifonsky | ALASKA | 6 | 2023 |
| Willow | ALASKA | 6 | 2024 |
| Anchor River | ALASKA | 4 | 2024 |
| Kenny Lake | ALASKA | 3 | 2024 |
| Cohoe | ALASKA | 3 | 2023 |
| Kachemak | ALASKA | 2 | 2024 |
| Burma Road | ALASKA | 2 | 2023 |
| Kuskulana | ALASKA | 2 | 2024 |
| Slana | ALASKA | 1 | 1997 |
| Chistochina | ALASKA | 1 | 2021 |
| Northway | ALASKA | 1 | 2023 |
| Sourdough | ALASKA | 1 | 1995 |
| Tonsina | ALASKA | 1 | 2021 |
| Hatcher Pass | ALASKA | 1 | 2023 |
| Swan Lake Rd | ALASKA | 1 | 2023 |
| Lake Louise | ALASKA | 1 | 1996 |
| Petersville | ALASKA | 1 | 2022 |
| Seven Lakes | ALASKA | 1 | 2023 |
| Unalakleet River | ALASKA | 1 | 2010 |
| Ft. Richrdsn | ALASKA | 1 | 2023 |
| Galena (Short) | ALASKA | 1 | 2024 |
| Nabesna Road | ALASKA | 1 | 1996 |
| Mccarthy Rd2 | ALASKA | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.