Usually considered conspecific with A. poecilorhyncha, including in recent monograph#R, but review of evidence presented in one important work#R strongly indicated species status, present species differing in its lack of red bill-spot; dark stripe from gape to cheek; reduced white on tertials; much less white scaling on underparts; purple-blue speculum; larger size; and type of sexual dimorphism. This status confirmed by sympatric breeding in China#R. Hybridizes extensively with A. platyrhynchos in Russian Far East#R. Monotypic.
SE Russia, E Mongolia, Sakhalin, Korea and Japan to E China. In winter to S China and may reach Thailand and Cambodia.
Food and feeding
Status and conservation
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