Red-breasted Merganser
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{{Taxobox | color = pink | name = Red-breasted Merganser | status = Conservation status: Lower risk (lc) | image = RedBreastMerg23.jpg | image_caption = Drake | image_width = 240px | regnum = Animalia | phylum = Chordata | classis = Aves | ordo = Anseriformes | familia = Anatidae | genus = Mergus | species = M. serrator | binomial = Mergus serrator | binomial_authority = Linnaeus, 1758 | range_map = Mergus serrator distr.png | range_map_width = 240px | range_map_caption = Red-breasted Merganser range }} The Red-breasted Merganser (Mergus serrator) is a duck.
Its breeding habitat is freshwater lakes and open areas on rivers across northern North America, Greenland, Europe and Asia. It nests in sheltered locations on the ground near water.
It is migratory and many northern breeders winter in coastal waters further south. In Europe, Scandinavian and Russian birds migrate southwards, but western European birds are largely resident.
The adult Red-breasted Merganser is 52-58 cm long with a 67-82 cm wingspan. It has a spiky crest and long thin red bill with serrated edges. Adult males have a dark head with a green sheen, a white neck with a rusty breast, a black back and white underparts. Adult females have a rusty head and a greyish body. Juveniles are like the female, but lack the white collar and have a smaller white wing patch.
The call of the female is a rasping prrak prrak, and the male gives a feeble hiccup-and-sneeze display call.
Red-breasted Mergansers dive and swim underwater. They mainly eat small fish, but also aquatic insects, crustaceans and frogs.
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