Species · BCR 10 · BBS 2025 Release · 1966–2024
Blue-winged Teal In Northern Rockies
Blue-winged Teal in Northern Rockies has declined: down 42% on the route-weighted index since 1970.
-42%Since 1970
82Routes In Region
56Years
Notable Signals
No notable trend signals for Blue-winged Teal in Northern Rockies. See the full index history below.
Forecast
If the recent trend holds, Blue-winged Teal in Northern Rockies is projected to fall about 53% by 2029 — from 0.10 in 2024 to a central estimate of 0.05 (95% range 0.00–0.47). A 5-year backtest shows a typical error of ±53.8%, with 100% of held-out values landing inside the 95% band.
-53%Change by 2029
0.05Projected 2029 index
0.00–0.4795% range
±53.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.49 |
| 2026 | 0.06 | 0.00 | 0.49 |
| 2027 | 0.06 | 0.00 | 0.48 |
| 2028 | 0.05 | 0.00 | 0.48 |
| 2029 | 0.05 | 0.00 | 0.47 |
Routes In Northern Rockies
| Arminto | WYOMING | 13 | 2004 |
| Mivoden | IDAHO | 7 | 1977 |
| Augusta | MONTANA | 7 | 2021 |
| Anchor | WYOMING | 6 | 2016 |
| Shirley | WYOMING | 6 | 1998 |
| Pablo Res. | MONTANA | 5 | 2023 |
| Clover Creek | OREGON | 5 | 1977 |
| Saleratus Cr | UTAH | 5 | 2007 |
| Curlew | WASHINGTON | 5 | 1993 |
| Nowood | WYOMING | 5 | 2024 |
| Lolo Pass | IDAHO | 4 | 2004 |
| Polson | MONTANA | 4 | 1999 |
| East Glacier Park | MONTANA | 4 | 2021 |
| Green River | WYOMING | 4 | 1978 |
| Cascade | IDAHO | 3 | 1975 |
| Wise River | MONTANA | 3 | 2018 |
| Willow Creek 2 | MONTANA | 3 | 2001 |
| Sparta | OREGON | 3 | 1977 |
| Otto | WYOMING | 3 | 2005 |
| Riverside | WYOMING | 3 | 1997 |
| Crazy Woman | WYOMING | 3 | 2006 |
| Boulder | WYOMING | 3 | 2022 |
| Rock River | WYOMING | 3 | 1998 |
| Maybell | COLORADO | 2 | 1982 |
| Lay | COLORADO | 2 | 2000 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.