Species · Massachusetts · BBS 2025 Release · 1966–2024
Hermit Thrush Population Trend in Massachusetts
Hermit Thrush in Massachusetts has increased: up 33% on the route-weighted index since 1968.
+33%Since 1968
30Routes In State
58Years
Notable Hermit Thrush Trends in Massachusetts
No notable trend signals for Hermit Thrush in Massachusetts. See the full index history below.
Hermit Thrush Population Forecast in Massachusetts
If the recent trend holds, Hermit Thrush in Massachusetts is projected to rise about 84% by 2029 — from 1.1 in 2024 to a central estimate of 2.0 (95% range 0.81–3.1). A 5-year backtest shows a typical error of ±70.9%, with 100% of held-out values landing inside the 95% band.
+84%Change by 2029
2.0Projected 2029 index
0.81–3.195% range
±70.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.9 | 0.75 | 3.1 |
| 2026 | 1.9 | 0.77 | 3.1 |
| 2027 | 1.9 | 0.78 | 3.1 |
| 2028 | 1.9 | 0.80 | 3.1 |
| 2029 | 2.0 | 0.81 | 3.1 |
Hermit Thrush Survey Routes in Massachusetts
| Ware River | 14 | 2022 | 1993 |
| Cummington | 5 | 2014 | 1968 |
| Chesterfield | 5 | 2024 | 1967 |
| Pittsfield | 5 | 2016 | 1967 |
| Maynard | 4 | 2006 | 1967 |
| Wellfleet 2 | 4 | 2024 | 2016 |
| Princeton | 3 | 1976 | 1970 |
| N Orange | 3 | 2024 | 1968 |
| Marion | 2 | 1994 | 1966 |
| Wellfleet | 2 | 1998 | 1966 |
| Warren | 2 | 2001 | 1968 |
| Sheffield | 2 | 2022 | 1969 |
| Cummington 2 | 2 | 2024 | 2015 |
| Hancock | 2 | 2015 | 1997 |
| E Dennis | 1 | 1986 | 1967 |
| Prattville | 1 | 2014 | 1966 |
| Brockton | 1 | 1975 | 1975 |
| Newburyport | 1 | 2009 | 1967 |
| Littleton | 1 | 2007 | 1973 |
| N Oxford | 1 | 2022 | 1995 |
| Mansfield | 1 | 1987 | 1987 |
| E Pepperell | 1 | 1988 | 1970 |
| Belchertown | 1 | 2024 | 1967 |
| S Barre | 1 | 2016 | 1976 |
| Cheshire | 1 | 1992 | 1969 |
Hermit Thrush Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.