Species · BCR 29 · BBS 2025 Release · 1966–2024
Blue-winged Warbler In Piedmont
Blue-winged Warbler in Piedmont has collapsed: down 81% on the route-weighted index since 1972.
-81%Since 1972
34Routes In Region
50Years
Notable Signals
long arc declinecomputed index
Blue-winged Warbler has collapsed in Piedmont: down 81% on the route-weighted index since 1972.
Forecast
If the recent trend holds, Blue-winged Warbler in Piedmont is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±44.9%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.1095% range
±44.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.10 |
| 2026 | 0.01 | 0.00 | 0.10 |
| 2027 | 0.00 | 0.00 | 0.10 |
| 2028 | 0.00 | 0.00 | 0.10 |
| 2029 | 0.00 | 0.00 | 0.10 |
Routes In Piedmont
| Jacobus | PENNSYLVANIA | 14 | 1997 |
| West Grove | PENNSYLVANIA | 3 | 1996 |
| Holly Sprs | GEORGIA | 2 | 1978 |
| Gillette | NEW-JERSEY | 2 | 2024 |
| Millerville | ALABAMA | 1 | 1973 |
| Baldwin | GEORGIA | 1 | 1970 |
| Bowdon | GEORGIA | 1 | 1990 |
| Olney | MARYLAND | 1 | 2024 |
| Pleasant Val | MARYLAND | 1 | 1987 |
| Bachman Mill | MARYLAND | 1 | 2007 |
| Eklo | MARYLAND | 1 | 2016 |
| Randallstown | MARYLAND | 1 | 2005 |
| Theodore | MARYLAND | 1 | 1988 |
| Ijamsville | MARYLAND | 1 | 2005 |
| Madonna | MARYLAND | 1 | 2014 |
| Earlton | MARYLAND | 1 | 2014 |
| Sandbrook | NEW-JERSEY | 1 | 2017 |
| Croton | NEW-JERSEY | 1 | 2007 |
| Pottersville | NEW-JERSEY | 1 | 1998 |
| Croton 2 | NEW-JERSEY | 1 | 2018 |
| Call | NORTH-CAROLINA | 1 | 1970 |
| Pottstown | PENNSYLVANIA | 1 | 1979 |
| Collegeville | PENNSYLVANIA | 1 | 2011 |
| Labott | PENNSYLVANIA | 1 | 1980 |
| Doe Run | PENNSYLVANIA | 1 | 1988 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.