Geographical variation in main part of range rather moderate, and probably clinal, palest populations occurring in far N areas. Isolated S population castaneiceps more distinctive, and may represent a separate species, having darker crown and nape (rufous-chestnut vs rufous) (1), rather more extensive black on lores, sometimes extending above eye in short supercilium (ns), whitish vs metallic royal-blue moustachial patch (2), greatly reduced blue on (and more attenuated) black rear ear-coverts (2), but apparently no mensural or vocal differences. Four subspecies currently recognized.
Food and feeding
Status and conservation
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