Species · Utah · BBS 2025 Release · 1966–2024
Ruffed Grouse Population Trend in Utah
Ruffed Grouse in Utah has fallen sharply: down 66% on the route-weighted index since 1978.
-66%Since 1978
18Routes In State
31Years
Notable Ruffed Grouse Trends in Utah
long arc declinecomputed index
Ruffed Grouse has fallen sharply in Utah: down 66% on the route-weighted index since 1978.
Ruffed Grouse Population Forecast in Utah
If the recent trend holds, Ruffed Grouse in Utah is projected to fall about 100% by 2029 — from 0.17 in 2024 to a central estimate of 0.00 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±141.1%, with 80% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–0.1495% range
±141.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.15 |
| 2026 | 0.00 | 0.00 | 0.14 |
| 2027 | 0.00 | 0.00 | 0.14 |
| 2028 | 0.00 | 0.00 | 0.14 |
| 2029 | 0.00 | 0.00 | 0.14 |
Ruffed Grouse Survey Routes in Utah
| Grizzly Rdge | 10 | 2024 | 1992 |
| Moon Lake 2 | 1 | 2023 | 2015 |
| Skyline Driv | 1 | 2003 | 2003 |
| Beck | 1 | 1981 | 1972 |
| Altonah | 1 | 1994 | 1994 |
| Gooseberry | 1 | 2013 | 2008 |
| Lost Cr. Res | 1 | 2015 | 1995 |
| Wasatch Nf | 1 | 2017 | 2002 |
| Saleratus Cr | 1 | 2015 | 2015 |
| Logan Canyon | 1 | 2018 | 2012 |
| Beck 2 | 1 | 2016 | 1995 |
| Heber Mtn. | 1 | 2022 | 2002 |
| Red Spur Mtn. | 1 | 2012 | 2012 |
| Woodruff | 1 | 2013 | 2013 |
| Hanna | 1 | 2003 | 2003 |
| Ferron | 1 | 2022 | 2007 |
| Randolph | 1 | 2009 | 2000 |
| Moon Lake | 1 | 1998 | 1998 |
Ruffed Grouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.