Species · BCR 4 · BBS 2025 Release · 1966–2024
Brown Creeper In BCR 4
Brown Creeper in BCR 4 has fallen sharply: down 67% on the route-weighted index since 1985.
-67%Since 1985
16Routes In Region
30Years
Notable Signals
long arc declinecomputed index
Brown Creeper has fallen sharply in BCR 4: down 66% on the route-weighted index since 1985.
Forecast
If the recent trend holds, Brown Creeper in BCR 4 is projected to fall about 47% by 2029 — from 0.08 in 2024 to a central estimate of 0.04 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±72.9%, with 100% of held-out values landing inside the 95% band.
-47%Change by 2029
0.04Projected 2029 index
0.00–0.2295% range
±72.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.05 | 0.00 | 0.23 |
| 2026 | 0.05 | 0.00 | 0.23 |
| 2027 | 0.05 | 0.00 | 0.23 |
| 2028 | 0.05 | 0.00 | 0.22 |
| 2029 | 0.04 | 0.00 | 0.22 |
Routes In BCR 4
| Swan Lake Rd | ALASKA | 4 | 2023 |
| Kalifonsky | ALASKA | 2 | 2018 |
| Ft. Richrdsn | ALASKA | 2 | 2022 |
| Circle | ALASKA | 1 | 1993 |
| Skilak Lake | ALASKA | 1 | 1977 |
| Willow | ALASKA | 1 | 2024 |
| Hatcher Pass | ALASKA | 1 | 2003 |
| Anchor River | ALASKA | 1 | 1997 |
| Chena Hot Spring 2 | ALASKA | 1 | 2019 |
| Cohoe | ALASKA | 1 | 2016 |
| Petersville | ALASKA | 1 | 2019 |
| Seven Lakes | ALASKA | 1 | 2019 |
| Kachemak | ALASKA | 1 | 1997 |
| Burma Road | ALASKA | 1 | 2024 |
| Donelly Dome | ALASKA | 1 | 2022 |
| Delta | ALASKA | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.