Species · BCR 28 · BBS 2025 Release · 1966–2024
American Bittern In Appalachian Mountains
American Bittern in Appalachian Mountains has fallen sharply: down 74% on the route-weighted index since 1970.
-74%Since 1970
26Routes In Region
26Years
Notable Signals
No notable trend signals for American Bittern in Appalachian Mountains. See the full index history below.
Forecast
If the recent trend holds, American Bittern in Appalachian Mountains is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.01). A 5-year backtest shows a typical error of ±126.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0195% range
±126.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.01 |
| 2026 | 0.00 | 0.00 | 0.01 |
| 2027 | 0.00 | 0.00 | 0.01 |
| 2028 | 0.00 | 0.00 | 0.01 |
| 2029 | 0.00 | 0.00 | 0.01 |
Routes In Appalachian Mountains
| Mawr Glen | PENNSYLVANIA | 3 | 1977 |
| Somers | NEW-YORK | 2 | 1970 |
| Hope | NEW-JERSEY | 1 | 1977 |
| Medusa | NEW-YORK | 1 | 1969 |
| Meridale | NEW-YORK | 1 | 2007 |
| Cobleskill | NEW-YORK | 1 | 2022 |
| S Berne | NEW-YORK | 1 | 1982 |
| Corbettsvile | NEW-YORK | 1 | 2024 |
| Lisle | NEW-YORK | 1 | 1976 |
| Dryden | NEW-YORK | 1 | 1984 |
| Phillips Cr | NEW-YORK | 1 | 1967 |
| Gainesville | NEW-YORK | 1 | 1981 |
| Cattaraugus | NEW-YORK | 1 | 1999 |
| S Vandalia | NEW-YORK | 1 | 1967 |
| New Marshfld | OHIO | 1 | 1974 |
| Cumberland | OHIO | 1 | 1979 |
| N Washington | PENNSYLVANIA | 1 | 1973 |
| Rasselas | PENNSYLVANIA | 1 | 2005 |
| Little Marsh | PENNSYLVANIA | 1 | 2022 |
| English Ctr | PENNSYLVANIA | 1 | 1974 |
| Bow Bridge | PENNSYLVANIA | 1 | 1998 |
| Millville | PENNSYLVANIA | 1 | 1971 |
| Honesdale | PENNSYLVANIA | 1 | 1974 |
| Pine Gr Mill | PENNSYLVANIA | 1 | 1974 |
| Stollings | WEST-VIRGINIA | 1 | 2003 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.