Species · Pennsylvania · BBS 2025 Release · 1966–2024
Swainson's Thrush Population Trend in Pennsylvania
Swainson's Thrush in Pennsylvania has declined: down 29% on the route-weighted index since 1969.
-29%Since 1969
17Routes In State
48Years
Notable Swainson's Thrush Trends in Pennsylvania
No notable trend signals for Swainson's Thrush in Pennsylvania. See the full index history below.
Swainson's Thrush Population Forecast in Pennsylvania
If the recent trend holds, Swainson's Thrush in Pennsylvania is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±61.2%, with 60% of held-out values landing inside the 95% band.
n/aChange by 2029
0.04Projected 2029 index
0.00–0.1095% range
±61.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.04 | 0.00 | 0.10 |
| 2026 | 0.04 | 0.00 | 0.10 |
| 2027 | 0.04 | 0.00 | 0.10 |
| 2028 | 0.04 | 0.00 | 0.10 |
| 2029 | 0.04 | 0.00 | 0.10 |
Swainson's Thrush Survey Routes in Pennsylvania
| Cherry Sprs | 6 | 2021 | 1974 |
| Whig Hill | 2 | 1988 | 1966 |
| Marsh Hill | 1 | 2005 | 1986 |
| Ellenton | 1 | 2013 | 1982 |
| Lynch | 1 | 2024 | 1975 |
| Lovelton | 1 | 2004 | 2004 |
| Odin | 1 | 2015 | 1973 |
| Betula | 1 | 2007 | 2007 |
| Russell City | 1 | 2024 | 1994 |
| Eldred | 1 | 2015 | 1990 |
| Rasselas | 1 | 2016 | 2016 |
| Roulette | 1 | 2016 | 1988 |
| Logue | 1 | 2016 | 2016 |
| Virginia | 1 | 1978 | 1978 |
| English Ctr | 1 | 1974 | 1971 |
| Laurel Hill | 1 | 1990 | 1990 |
| Mawr Glen | 1 | 1975 | 1968 |
Swainson's Thrush Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.