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scaly-sided merganser

alt. ''Mergus squamatus'', an endangered species of merganser found in eastern Asia n. ''Mergus squamatus'', an endangered species of merganser found in eastern Asia

Wikipedia
Scaly-sided merganser

The scaly-sided merganser or Chinese merganser (Mergus squamatus) is an endangered typical merganser ( genus Mergus). It lives in temperate East Asia, breeding in the north and wintering in the south.