Species · New Hampshire · BBS 2025 Release · 1966–2024
Hermit Thrush Population Trend in New Hampshire
Hermit Thrush in New Hampshire has risen sharply: up 72% on the route-weighted index since 1968.
+72%Since 1968
26Routes In State
58Years
Notable Hermit Thrush Trends in New Hampshire
long arc increasecomputed index
Hermit Thrush has risen sharply in New Hampshire: up 72% on the route-weighted index since 1968.
Hermit Thrush Population Forecast in New Hampshire
If the recent trend holds, Hermit Thrush in New Hampshire is projected to rise about 38% by 2029 — from 3.6 in 2024 to a central estimate of 5.0 (95% range 2.5–7.5). A 5-year backtest shows a typical error of ±84.7%, with 60% of held-out values landing inside the 95% band.
+38%Change by 2029
5.0Projected 2029 index
2.5–7.595% range
±84.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 4.8 | 2.3 | 7.3 |
| 2026 | 4.9 | 2.4 | 7.3 |
| 2027 | 4.9 | 2.4 | 7.4 |
| 2028 | 5.0 | 2.5 | 7.4 |
| 2029 | 5.0 | 2.5 | 7.5 |
Hermit Thrush Survey Routes in New Hampshire
| Jefferson Hl | 12 | 2024 | 1966 |
| Milan | 9 | 2024 | 1967 |
| Dixvil Notch | 8 | 2017 | 1966 |
| Glen | 8 | 2024 | 1975 |
| Mt Chocorua | 7 | 2024 | 1966 |
| Franconia | 7 | 2024 | 1966 |
| Clarksville | 7 | 2024 | 1966 |
| Dixville Notch 2 | 7 | 2024 | 2018 |
| Epsom | 5 | 2023 | 1969 |
| Wilmot | 5 | 2024 | 1966 |
| Canterbury | 4 | 2024 | 1974 |
| Marlow | 4 | 2022 | 1966 |
| Stratford | 4 | 2022 | 1966 |
| Peterborough | 3 | 2024 | 1967 |
| Concord | 3 | 2024 | 1966 |
| Lempster | 3 | 2019 | 1969 |
| Crawford Not | 3 | 1975 | 1967 |
| Jeffers Ntch | 3 | 2024 | 1993 |
| Gilmantn I W | 2 | 2024 | 1970 |
| Walpole | 2 | 2024 | 1966 |
| Brentwood | 1 | 1998 | 1966 |
| Fitzwilliam | 1 | 2024 | 1966 |
| Dover | 1 | 2023 | 1966 |
| Hopkinton | 1 | 2023 | 1966 |
| Strafford | 1 | 2023 | 1966 |
Hermit Thrush Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.