Species · New Hampshire · BBS 2025 Release · 1966–2024
Vesper Sparrow Population Trend in New Hampshire
Vesper Sparrow in New Hampshire has collapsed: down 86% on the route-weighted index since 1968.
-86%Since 1968
20Routes In State
18Years
Notable Vesper Sparrow Trends in New Hampshire
long arc declinecomputed index
Vesper Sparrow has collapsed in New Hampshire: down 86% on the route-weighted index since 1968.
Vesper Sparrow Population Forecast in New Hampshire
If the recent trend holds, Vesper Sparrow in New Hampshire is projected to stay roughly flat through 1999, near 0.00 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±408.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 1999
0.00Projected 1999 index
0.00–0.2795% range
±408.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 1995 | 0.00 | 0.00 | 0.27 |
| 1996 | 0.00 | 0.00 | 0.27 |
| 1997 | 0.00 | 0.00 | 0.27 |
| 1998 | 0.00 | 0.00 | 0.27 |
| 1999 | 0.00 | 0.00 | 0.27 |
Vesper Sparrow Survey Routes in New Hampshire
| Peterborough | 3 | 1971 | 1971 |
| Hopkinton | 2 | 1971 | 1968 |
| Wilmot | 2 | 1968 | 1966 |
| Walpole | 2 | 1970 | 1967 |
| Marlow | 2 | 1967 | 1967 |
| Dixvil Notch | 2 | 1970 | 1966 |
| Brentwood | 1 | 1975 | 1967 |
| Fitzwilliam | 1 | 1973 | 1969 |
| Dover | 1 | 1975 | 1970 |
| Epsom | 1 | 1986 | 1986 |
| Concord | 1 | 1976 | 1968 |
| Canterbury | 1 | 1975 | 1969 |
| Gilmantn I W | 1 | 1971 | 1971 |
| Lempster | 1 | 1984 | 1984 |
| Crawford Not | 1 | 1969 | 1969 |
| Jefferson Hl | 1 | 1968 | 1968 |
| Franconia | 1 | 1980 | 1967 |
| Milan | 1 | 1994 | 1992 |
| Stratford | 1 | 1979 | 1966 |
| Clarksville | 1 | 1985 | 1985 |
Vesper Sparrow Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.