What is "red-breasted merganser"

n. A species of diving duck, ''Mergus serrator''.

n. widely distributed merganser of America and Europe [syn: Mergus serrator]

The red-breasted merganser (Mergus serrator) is a diving duck, one of the sawbills. The genus name is a Latin word used by Pliny and other Roman authors to refer to an unspecified waterbird, and serrator is a sawyer from Latin serra, "saw".