Until recently considered conspecific with T. paradisi, T. affinis and T. floris, but molecular study#R suggests otherwise. Differs from T. paradisi in its much shorter crest (3); smaller bill (allow 2); darker chestnut upperparts (1); female with hood (3). From T. affinis in its darker chestnut upperparts in female and male rufous morph (1); female with white vs pale rufous vent (2); female with hood (3); shorter, shallower bill (allow 1). From T. floris in its much darker chestnut upperparts in female and male rufous morph (2); white vs pale to darkish buff lower breast and belly in female (1); much shorter tail in female (at least 2); shorter, shallower bill (ns); and shorter crest in both sexes, this not being correlated with size (1). Has been suggested as being conspecific with T. atrocaudata, because the two hybridize, but interbreeding is very limited as ranges barely overlap; further study needed. Monotypic.
C, NE, E & SE China, Russian Far East (S Ussuriland) and N Korea; non-breeding mainly SE Asia.
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