Merginae
Merginae is a subfamily of diving ducks within the family Anatidae. This subfamily primarily consists of species known for their specialized diving behaviors, often feeding on fish, crustaceans, and other aquatic invertebrates. The subfamily is characterized by adaptations for efficient underwater foraging, including dense plumage for insulation, strong legs positioned far back on their bodies for powerful propulsion, and often serrated bills that aid in gripping slippery prey.
The subfamily Merginae includes several distinct genera, such as Mergus (mergansers), Bucephala (goldeneyes and buffleheads), Clangula
The geographic distribution of Merginae species is largely Holarctic, with many found in the colder regions