Species · BCR 10 · BBS 2025 Release · 1966–2024
American Bittern In Northern Rockies
American Bittern in Northern Rockies has declined: down 40% on the route-weighted index since 1970.
-40%Since 1970
17Routes In Region
47Years
Notable Signals
No notable trend signals for American Bittern in Northern Rockies. See the full index history below.
Forecast
If the recent trend holds, American Bittern in Northern Rockies is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±124.3%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.1395% range
±124.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.13 |
| 2026 | 0.00 | 0.00 | 0.13 |
| 2027 | 0.00 | 0.00 | 0.13 |
| 2028 | 0.00 | 0.00 | 0.13 |
| 2029 | 0.00 | 0.00 | 0.13 |
Routes In Northern Rockies
| Kalispell | MONTANA | 2 | 2024 |
| Randolph | UTAH | 2 | 2024 |
| Cody | WYOMING | 2 | 1991 |
| Mtn View | WYOMING | 2 | 1994 |
| Patrick Draw 2 | WYOMING | 2 | 1982 |
| Lay | COLORADO | 1 | 2000 |
| Naples | IDAHO | 1 | 2023 |
| St Mary | MONTANA | 1 | 1995 |
| Beaverhead | MONTANA | 1 | 2024 |
| Pablo Res. | MONTANA | 1 | 1995 |
| Silver Creek | OREGON | 1 | 2018 |
| Patrick Draw | WYOMING | 1 | 1979 |
| Mammoth | WYOMING | 1 | 1997 |
| Hunter Peak | WYOMING | 1 | 2010 |
| Lovell | WYOMING | 1 | 2004 |
| Diamondville | WYOMING | 1 | 1980 |
| Green River | WYOMING | 1 | 1982 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.