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Mergus serrator (Red-breasted Merganser)


English: Red-breasted Merganser
Russian:  Длинноносый крохаль

German:  Mitteisager

French:  Harle huppe

Mongolian:  Сэвгэр бохио, Сэвгэр нугас

Japanese:  ウミアイサ (Umi-aisa)

Body length: 52-58 cm
Wing span:  67-82cm

Habitat: Breeds along coasts, in archipelagos and at clear inland waters both in taiga and in mountains and on tundra. Gregarious, even in breeding season, but rarely forms very large flocks ( as Goosander habitually does). Nest on ground among sheltering vegetation.

Identification: Medium-large, slimmer than Goosander but otherwise very similar. Bill is narrower, especially at base, and crest is more brush-like and shaggy (on ♂ almost pink), giving slightly small-headed appearance; neck also narrower. Adult ♂ breeding: Head black, glossed green; white collar above black-streaked rufous-brown breast; black area with large white spots at side of breast is distinctive. Most of upperparts black, flanks grey. In flight, large white patch on inner wing, but not so extensive as on  Goosander.

  • Adult ♀: Resembles ♀ Goosander. For separation, note the following: lack of sharp division between  brown head and off-white lower neck; pale throat patch diffusely set off; bill thin at base, crest shorter and ‘spikier’; head more cinnamon-brown, not so dark red; more ‘striped’ face, with pale lores and dark lines above and below; back darker tinged brown, and flanks less clean grey; in flight, head and neck appear slimmer; white square on inner wing invariably divided by obvious black line; upper forewing dark brown-grey, darker and less clean grey than on Goosander.
  • Adult ♂ eclipse: Like adult ♀, but retains extensive white on wing.
  • Juvenile: Like adult ♀, but bill duller red, and crest shorter. 1 summer ♂: Attains most of adult ♂ plumage except for head and neck, head being tinged brownish, neck largely lacking the white on wing not so extensive as on adult ♂.




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