Borabhum and Dhalbhum, Bihar–Bengal border, north-east India.
Closely related to H. longipennis, with which it has been considered conspecific; but morphological differences are constant, with no evidence of intergradation where parapatric ranges of the two meet. Proposed race dryas (from S Gujarat, in W India) considered undiagnosable. Monotypic.
Sri Lanka, and India (W to Uttarakhand, E Rajasthan and SE Gujarat), S Nepal and S Bhutan E to Myanmar, S China (SW Yunnan), NC & W Thailand (S to Kaeng Krachan) and S Indochina.
Food and feeding
Status and conservation
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