Species · Oregon · BBS 2025 Release · 1966–2024
Sooty Grouse Population Trend in Oregon
Sooty Grouse in Oregon has collapsed: down 85% on the route-weighted index since 1970.
-85%Since 1970
35Routes In State
54Years
Notable Sooty Grouse Trends in Oregon
long arc declinecomputed index
Sooty Grouse has collapsed in Oregon: down 85% on the route-weighted index since 1970.
Sooty Grouse Population Forecast in Oregon
If the recent trend holds, Sooty Grouse in Oregon is projected to fall about 57% by 2029 — from 0.13 in 2024 to a central estimate of 0.06 (95% range 0.00–0.34). A 5-year backtest shows a typical error of ±78.4%, with 100% of held-out values landing inside the 95% band.
-57%Change by 2029
0.06Projected 2029 index
0.00–0.3495% range
±78.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.35 |
| 2026 | 0.07 | 0.00 | 0.35 |
| 2027 | 0.06 | 0.00 | 0.35 |
| 2028 | 0.06 | 0.00 | 0.35 |
| 2029 | 0.06 | 0.00 | 0.34 |
Sooty Grouse Survey Routes in Oregon
| Timber | 5 | 2017 | 1968 |
| Cinderella | 5 | 2024 | 1993 |
| Warner Mtn. | 4 | 2024 | 1992 |
| Cool Camp | 3 | 2013 | 1968 |
| Camp Sherman | 3 | 1996 | 1972 |
| Myrtle Grove | 3 | 2015 | 1992 |
| Wedderburn | 2 | 2019 | 2005 |
| Paisley | 2 | 2023 | 2008 |
| Svensen | 2 | 1991 | 1991 |
| Elk Lake | 2 | 1995 | 1972 |
| Sisters | 2 | 2024 | 2012 |
| Lakeview | 2 | 2023 | 2001 |
| Shellrock | 1 | 2018 | 1968 |
| Molalla | 1 | 2023 | 1994 |
| Riley Peak | 1 | 1995 | 1995 |
| Santiam | 1 | 2015 | 1995 |
| Scappoose | 1 | 2007 | 1995 |
| Salado | 1 | 1976 | 1968 |
| Bull Run | 1 | 2022 | 2008 |
| Umpqua | 1 | 1980 | 1974 |
| Wizard Falls | 1 | 2023 | 2016 |
| Days Creek | 1 | 1994 | 1971 |
| Harlan 2 | 1 | 2022 | 2022 |
| Emigrant Lake 2 | 1 | 2002 | 2002 |
| Bly 2 | 1 | 2008 | 2008 |
Sooty Grouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.