Species · Wyoming · BBS 2025 Release · 1966–2024
Dusky Grouse Population Trend in Wyoming
Dusky Grouse in Wyoming has fallen sharply: down 65% on the route-weighted index since 1993.
-65%Since 1993
11Routes In State
18Years
Notable Dusky Grouse Trends in Wyoming
long arc declinecomputed index
Dusky Grouse has fallen sharply in Wyoming: down 65% on the route-weighted index since 1993.
Dusky Grouse Population Forecast in Wyoming
If the recent trend holds, Dusky Grouse in Wyoming is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±122.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0595% range
±122.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.05 |
| 2026 | 0.01 | 0.00 | 0.05 |
| 2027 | 0.01 | 0.00 | 0.05 |
| 2028 | 0.01 | 0.00 | 0.05 |
| 2029 | 0.00 | 0.00 | 0.05 |
Dusky Grouse Survey Routes in Wyoming
| Savery | 7 | 1989 | 1989 |
| Bald Mtn | 2 | 2002 | 1999 |
| Fiddler Lk | 2 | 2010 | 2001 |
| Anchor | 2 | 1993 | 1993 |
| Hunter Peak | 1 | 2008 | 1998 |
| Moose | 1 | 2024 | 2023 |
| Yellowstone | 1 | 2005 | 1991 |
| Alpine | 1 | 2021 | 2007 |
| Horse Creek | 1 | 1993 | 1993 |
| Savery 2 | 1 | 2014 | 2007 |
| Mammoth | 1 | 2023 | 2023 |
Dusky Grouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.