Species · BCR 30 · BBS 2025 Release · 1966–2024
Common Merganser In New England / Mid-Atlantic Coast
Common Merganser in New England / Mid-Atlantic Coast has fallen sharply: down 60% on the route-weighted index since 1992.
-60%Since 1992
8Routes In Region
15Years
Notable Signals
No notable trend signals for Common Merganser in New England / Mid-Atlantic Coast. See the full index history below.
Routes In New England / Mid-Atlantic Coast
| E Hartland | CONNECTICUT | 2 | 1992 |
| Sherman | CONNECTICUT | 1 | 2013 |
| Long Hill | CONNECTICUT | 1 | 2019 |
| Mid Haddam | CONNECTICUT | 1 | 2011 |
| Southington | CONNECTICUT | 1 | 2001 |
| Granby | CONNECTICUT | 1 | 2021 |
| Marion | MASSACHUSETTS | 1 | 1998 |
| Belchertown | MASSACHUSETTS | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.