heavy-bodied Old World diving duck having a grey-and-black body and reddish head 同义词：Aythya ferina,
例句与用法
1.
Some of them are globally threatened species such as black - faced spoonbill , saunders gull , baikal teal , baer s pochard and dalmatian pelican 该处亦为成千上万在春秋迁徙季节来回北极俄罗斯及澳洲之间的过境鸟提供一个重要的休息地及加油站。
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