Belongs to a group of dark-coloured, iridescent Asian and Australasian forms, including †C. versicolor, †C. jouyi, C. vitiensis and C. leucomela; C. pallidiceps may also be related. Race nitens appears highly distinctive in recent illustrations#R#R, but specimen material at NHMUK shows weaker differences, with nitens appearing slightly smaller (measurements not taken; score estimated no more than 1) and with more extensive (but variable) pinkish gloss on crown and throat (score 2); this variability of nitens may be related to age, wear, sex, individuals or geography, and greater sampling (also of vocalizations) is needed to resolve this issue; moderate genetic differences have been noted#R. Three subspecies recognized.
Food and feeding
Status and conservation
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