Species · Pennsylvania · BBS 2025 Release · 1966–2024
American Bittern Population Trend in Pennsylvania
American Bittern in Pennsylvania has fallen sharply: down 66% on the route-weighted index since 1969.
Notable American Bittern Trends in PennsylvaniaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →
No notable trend signals for American Bittern in Pennsylvania. See the full index history below.
American Bittern Survey Routes in Pennsylvania
| Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology → | |||
|---|---|---|---|
| Mawr Glen | 3 | 1977 | 1969 |
| Slippery Rk | 2 | 1990 | 1990 |
| Espyville | 1 | 1974 | 1970 |
| Bow Bridge | 1 | 1998 | 1998 |
| Millville | 1 | 1971 | 1971 |
| Ferris Crnrs | 1 | 1968 | 1968 |
| Honesdale | 1 | 1974 | 1974 |
| Teepleville | 1 | 1973 | 1967 |
| Pine Gr Mill | 1 | 1974 | 1974 |
| N Washington | 1 | 1973 | 1973 |
| Rasselas | 1 | 2005 | 2005 |
| Little Marsh | 1 | 2022 | 2022 |
| English Ctr | 1 | 1974 | 1974 |
American Bittern Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.