A fish-eating duck(Mergus merganser),the male of which has a glossy greenish-black head and a white body.

 
  • 秋沙鸭(普通秋沙鸭)属的食鱼的鸭,雄性秋沙鸭头部光滑,呈墨绿色;鸭身呈白色
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