Species · BCR 4 · BBS 2025 Release · 1966–2024
American Crow In BCR 4
American Crow in BCR 4 has risen sharply: up 61% on the route-weighted index since 1987.
+61%Since 1987
5Routes In Region
37Years
Notable Signals
long arc increasecomputed index
American Crow has risen sharply in BCR 4: up 61% on the route-weighted index since 1987.
Forecast
If the recent trend holds, American Crow in BCR 4 is projected to fall about 15% by 2029 — from 0.69 in 2024 to a central estimate of 0.59 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±32.3%, with 100% of held-out values landing inside the 95% band.
-15%Change by 2029
0.59Projected 2029 index
0.00–1.295% range
±32.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.58 | 0.00 | 1.2 |
| 2026 | 0.58 | 0.00 | 1.2 |
| 2027 | 0.58 | 0.00 | 1.2 |
| 2028 | 0.59 | 0.00 | 1.2 |
| 2029 | 0.59 | 0.00 | 1.2 |
Routes In BCR 4
| Kachemak | ALASKA | 22 | 2024 |
| Kalifonsky | ALASKA | 8 | 2022 |
| Homer | ALASKA | 4 | 1982 |
| Anchor River | ALASKA | 3 | 2024 |
| Seven Lakes | ALASKA | 1 | 1996 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.