Species · Pennsylvania · BBS 2025 Release · 1966–2024
Ruffed Grouse Population Trend in Pennsylvania
Ruffed Grouse in Pennsylvania has collapsed: down 82% on the route-weighted index since 1968.
-82%Since 1968
74Routes In State
57Years
Notable Ruffed Grouse Trends in Pennsylvania
long arc declinecomputed index
Ruffed Grouse has collapsed in Pennsylvania: down 82% on the route-weighted index since 1968.
Ruffed Grouse Population Forecast in Pennsylvania
If the recent trend holds, Ruffed Grouse in Pennsylvania is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±70.5%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.03Projected 2028 index
0.00–0.1495% range
±70.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.04 | 0.00 | 0.15 |
| 2025 | 0.04 | 0.00 | 0.15 |
| 2026 | 0.04 | 0.00 | 0.14 |
| 2027 | 0.04 | 0.00 | 0.14 |
| 2028 | 0.03 | 0.00 | 0.14 |
Ruffed Grouse Survey Routes in Pennsylvania
| Harmonsburg | 6 | 1977 | 1977 |
| Little Marsh | 4 | 2006 | 1998 |
| Ralston | 3 | 1966 | 1966 |
| Roulette | 2 | 2014 | 1974 |
| Austinville | 2 | 1987 | 1987 |
| Rector | 2 | 1966 | 1966 |
| Clear Spring | 2 | 1982 | 1966 |
| Drehersville | 2 | 1989 | 1989 |
| Ferris Crnrs | 1 | 2002 | 1967 |
| Whig Hill | 1 | 2019 | 1970 |
| Ellenton | 1 | 2022 | 1986 |
| Teepleville | 1 | 1990 | 1967 |
| Sigel | 1 | 2009 | 1991 |
| Lynch | 1 | 2021 | 1982 |
| N Washington | 1 | 1996 | 1968 |
| N Pine Grove | 1 | 1989 | 1986 |
| Pottersdale | 1 | 1980 | 1980 |
| Odin | 1 | 2004 | 1990 |
| Betula | 1 | 2017 | 1993 |
| Russell City | 1 | 1994 | 1970 |
| Ridgway | 1 | 2007 | 2001 |
| Eldred | 1 | 2007 | 1973 |
| Rasselas | 1 | 2014 | 1988 |
| Starlight 2 | 1 | 2017 | 2017 |
| Arnot | 1 | 2017 | 1987 |
Ruffed Grouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.