Species · BCR 13 · BBS 2025 Release · 1966–2024
Black-crowned Night Heron In Lower Great Lakes / St. Lawrence Plain
Black-crowned Night Heron in Lower Great Lakes / St. Lawrence Plain has declined: down 47% on the route-weighted index since 1971.
-47%Since 1971
15Routes In Region
16Years
Notable Signals
No notable trend signals for Black-crowned Night Heron in Lower Great Lakes / St. Lawrence Plain. See the full index history below.
Routes In Lower Great Lakes / St. Lawrence Plain
| Catskills | NEW-YORK | 4 | 1990 |
| Mt Morris | NEW-YORK | 3 | 1975 |
| Sheridan | NEW-YORK | 2 | 1972 |
| E Youngstown | NEW-YORK | 2 | 1989 |
| Cicero Ctr | NEW-YORK | 2 | 1966 |
| Peru | OHIO | 2 | 1978 |
| Orleans | NEW-YORK | 1 | 1972 |
| Hamburg | NEW-YORK | 1 | 1977 |
| West Seneca | NEW-YORK | 1 | 1981 |
| Watertown | NEW-YORK | 1 | 1971 |
| Lenox | OHIO | 1 | 2022 |
| Lattasburg | OHIO | 1 | 1976 |
| Espyville | PENNSYLVANIA | 1 | 1998 |
| Ferris Crnrs | PENNSYLVANIA | 1 | 1991 |
| Grand Isle | VERMONT | 1 | 1979 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.