Species · Pennsylvania · BBS 2025 Release · 1966–2024
Hermit Thrush Population Trend in Pennsylvania
Hermit Thrush in Pennsylvania has surged: up 170% on the route-weighted index since 1968.
+170%Since 1968
81Routes In State
58Years
Notable Hermit Thrush Trends in Pennsylvania
long arc increasecomputed index
Hermit Thrush has surged in Pennsylvania: up 170% on the route-weighted index since 1968.
Hermit Thrush Population Forecast in Pennsylvania
If the recent trend holds, Hermit Thrush in Pennsylvania is projected to rise about 82% by 2029 — from 1.3 in 2024 to a central estimate of 2.5 (95% range 1.2–3.8). A 5-year backtest shows a typical error of ±138.7%, with 0% of held-out values landing inside the 95% band.
+82%Change by 2029
2.5Projected 2029 index
1.2–3.895% range
±138.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 2.4 | 1.1 | 3.6 |
| 2026 | 2.4 | 1.1 | 3.7 |
| 2027 | 2.4 | 1.1 | 3.7 |
| 2028 | 2.4 | 1.1 | 3.7 |
| 2029 | 2.5 | 1.2 | 3.8 |
Hermit Thrush Survey Routes in Pennsylvania
| Odin | 14 | 2024 | 1973 |
| Lynch | 11 | 2024 | 1968 |
| Rasselas | 11 | 2022 | 1969 |
| Marsh Hill | 11 | 2024 | 1983 |
| Russell City | 8 | 2024 | 1968 |
| Ansonia | 8 | 2024 | 2002 |
| Little Marsh | 7 | 2024 | 1969 |
| Cherry Sprs | 7 | 2023 | 1974 |
| Starlight | 7 | 1999 | 1980 |
| Ellenton | 6 | 2024 | 1982 |
| Sproul Sf-B | 6 | 2024 | 2002 |
| Ridgway | 5 | 2018 | 1966 |
| Pocono Summit | 5 | 2024 | 1967 |
| Sproul Sf-A | 5 | 2024 | 2002 |
| N Pine Grove | 4 | 2024 | 1969 |
| Roulette | 4 | 2021 | 1972 |
| Susquehanna | 4 | 2024 | 1972 |
| New Ringgold | 4 | 2008 | 1983 |
| Sugar Grove | 4 | 2023 | 1995 |
| Ltl Pine Cr | 4 | 2024 | 1990 |
| Duboistown | 4 | 2021 | 1987 |
| Sigel | 3 | 2021 | 1991 |
| Arnot | 3 | 2024 | 1971 |
| Logue | 3 | 2023 | 1970 |
| Canadensis | 3 | 2024 | 1977 |
Hermit Thrush Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.