 In 2017, a new subspecies "muzongensis" that is closely associated with "nigra" was described from southeastern Xizang, China, quite near to the border with Arunachal Pradesh, India.These two and "mechukaensis" have ochraceous–buff or orange–buff underparts, becoming deep rufous–chestnut towards the edge of the patagium.The head and upperparts are dark chestnut, darker towards the upper back and head, and the tail is blackish.