North-eastern India (Assam, Tripura, Manipur), Bangladesh hills and western and south-western Myanmar south to southern Thailand, Peninsular Malaysia and Sumatra (and islands off western coast except Simeulue), and western Java and Borneo.
Van Hasselt's Sunbird (Leptocoma brasiliana) [XC407536]
by Lonnie Bregman from Sarawak; Sri Aman Division, Batang Ai National Park, Lubang Baya field station, Malaysia (song)
Van Hasselt's Sunbird (Leptocoma brasiliana) [XC436183]
by Ding Li Yong from Adampur Forest, Bangladesh (song)
Subspecies
Considered by some authors to be a subspecies of Purple-throated Sunbird (Leptocoma sperata).
The following 6 subspecies are recognised:
brasiliana (Gmelin, 1788) - North-eastern India (Assam, Tripura, Manipur), Bangladesh hills and western and south-western Myanmar south to southern Thailand, Peninsular Malaysia and Sumatra (and islands off western coast except Simeulue), and western Java and Borneo.
emmae Delacour & Jabouille, 1928 - Cambodia, southern Laos and southern Vietnam (probably also this subspecies in Tonkin).
mecynorhyncha (Oberholser, 1912) - Simeulue I (off western Sumatra).
eumecis (Oberholser, 1917) - Anamba Is, off eastern Peninsular Malaysia.