The breeding male is a beautifully patterned grey, with a black rear end and a brilliant white speculum, obvious in flight or at rest.
英
美
释义
嘴黑,头棕,尾黑,次级飞羽具白斑及腿橘黄为其主要特征。比绿头鸭稍小,嘴稍细。
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