Suddenly, a female Red-breasted merganser appeared with a long, narrow fish, held in the sawtooth bill. By the way, the latter has given it the Latin name 'serrator' which means "sawyer" (or with saw teeth). The Red-breasted merganser occurs in almost the entire circumpolar area, from Alaska to northern Scandinavia and northern Asia. During winter, most move south, like this female. The male differs from the female by a longer nape of the neck and a greenish, dark head and ditto neck.