Species · Massachusetts · BBS 2025 Release · 1966–2024
Hooded Merganser Population Trend in Massachusetts
Hooded Merganser in Massachusetts has increased: up 31% on the route-weighted index since 2001.
+31%Since 2001
9Routes In State
14Years
Notable Hooded Merganser Trends in Massachusetts
No notable trend signals for Hooded Merganser in Massachusetts. See the full index history below.
Hooded Merganser Survey Routes in Massachusetts
| Monterey | 2 | 2019 | 2019 |
| Ware River | 1 | 2017 | 2012 |
| Littleton | 1 | 2013 | 2013 |
| Belchertown | 1 | 2015 | 2015 |
| Holden | 1 | 2007 | 2005 |
| N Orange | 1 | 2022 | 1997 |
| Chesterfield | 1 | 2021 | 2000 |
| Warren 2 | 1 | 2024 | 2019 |
| Sheffield | 1 | 2000 | 2000 |
Hooded Merganser Population Trend in Other States
alabamaalaskaarkansascoloradoconnecticutidahoillinoisindianaiowakansaskentuckymainemarylandmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontwashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.