Species · Pennsylvania · BBS 2025 Release · 1966–2024
Blue-winged Warbler Population Trend in Pennsylvania
Blue-winged Warbler in Pennsylvania has held roughly steady: down 9% on the route-weighted index since 1968.
-9%Since 1968
101Routes In State
58Years
Notable Blue-winged Warbler Trends in Pennsylvania
No notable trend signals for Blue-winged Warbler in Pennsylvania. See the full index history below.
Blue-winged Warbler Population Forecast in Pennsylvania
If the recent trend holds, Blue-winged Warbler in Pennsylvania is projected to rise about 145% by 2029 — from 0.16 in 2024 to a central estimate of 0.38 (95% range 0.00–0.90). A 5-year backtest shows a typical error of ±191.2%, with 100% of held-out values landing inside the 95% band.
+145%Change by 2029
0.38Projected 2029 index
0.00–0.9095% range
±191.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.39 | 0.00 | 0.90 |
| 2026 | 0.39 | 0.00 | 0.90 |
| 2027 | 0.39 | 0.00 | 0.90 |
| 2028 | 0.39 | 0.00 | 0.90 |
| 2029 | 0.38 | 0.00 | 0.90 |
Blue-winged Warbler Survey Routes in Pennsylvania
| Jacobus | 14 | 1997 | 1992 |
| Duvall | 5 | 2021 | 1975 |
| Harmonsburg | 4 | 2023 | 1968 |
| Eldred | 3 | 2022 | 1987 |
| Poyntelle | 3 | 2024 | 1975 |
| West Grove | 3 | 1996 | 1975 |
| Espyville | 2 | 2009 | 1967 |
| Ferris Crnrs | 2 | 2024 | 1971 |
| Waller | 2 | 2014 | 1978 |
| Starlight | 2 | 1999 | 1975 |
| Canadensis | 2 | 2014 | 1992 |
| Portersville | 2 | 1975 | 1974 |
| Brunnerville | 2 | 2007 | 1969 |
| Quakertown | 2 | 1987 | 1970 |
| Starlight 2 | 2 | 2024 | 2008 |
| Slippery Rk | 1 | 1994 | 1970 |
| Clover | 1 | 2024 | 1988 |
| Whig Hill | 1 | 2009 | 1966 |
| Akeley | 1 | 1979 | 1968 |
| Teepleville | 1 | 2024 | 1967 |
| Sigel | 1 | 2014 | 1990 |
| N Washington | 1 | 2022 | 1967 |
| N Pine Grove | 1 | 2012 | 1969 |
| Betula | 1 | 2022 | 1987 |
| Russell City | 1 | 2012 | 2012 |
Blue-winged Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.