Species · New Hampshire · BBS 2025 Release · 1966–2024
Ruffed Grouse Population Trend in New Hampshire
Ruffed Grouse in New Hampshire has collapsed: down 88% on the route-weighted index since 1968.
-88%Since 1968
24Routes In State
47Years
Notable Ruffed Grouse Trends in New Hampshire
long arc declinecomputed index
Ruffed Grouse has collapsed in New Hampshire: down 87% on the route-weighted index since 1968.
Ruffed Grouse Population Forecast in New Hampshire
If the recent trend holds, Ruffed Grouse in New Hampshire is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±124.9%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.1995% range
±124.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.20 |
| 2026 | 0.01 | 0.00 | 0.19 |
| 2027 | 0.00 | 0.00 | 0.19 |
| 2028 | 0.00 | 0.00 | 0.19 |
| 2029 | 0.00 | 0.00 | 0.19 |
Ruffed Grouse Survey Routes in New Hampshire
| Brentwood | 3 | 1967 | 1967 |
| Crawford Not | 2 | 1975 | 1966 |
| Peterborough | 1 | 2005 | 1968 |
| Fitzwilliam | 1 | 2015 | 1968 |
| Dover | 1 | 1975 | 1967 |
| Hopkinton | 1 | 2022 | 1976 |
| Epsom | 1 | 2019 | 1976 |
| Concord | 1 | 2015 | 1974 |
| Strafford | 1 | 2015 | 1966 |
| Canterbury | 1 | 1990 | 1974 |
| Gilmantn I W | 1 | 2001 | 1978 |
| Wilmot | 1 | 1999 | 1977 |
| Mt Chocorua | 1 | 2019 | 1968 |
| Walpole | 1 | 2019 | 1968 |
| Marlow | 1 | 2024 | 1967 |
| Lempster | 1 | 2016 | 1971 |
| Jefferson Hl | 1 | 2012 | 2004 |
| Franconia | 1 | 1994 | 1966 |
| Milan | 1 | 2003 | 1983 |
| Stratford | 1 | 2012 | 1966 |
| Dixvil Notch | 1 | 2003 | 1971 |
| Clarksville | 1 | 2023 | 1966 |
| Glen | 1 | 2023 | 1975 |
| Dixville Notch 2 | 1 | 2019 | 2019 |
Ruffed Grouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.