This species is found in two distinct populations, one centered on northeastern South Asia (Bangladesh, Bhutan, northeastern India and Nepal [Molur et al. 2005]) and northwestern Myanmar, and a second ranging through central and eastern Myanmar, southern China (Yunnan, west of the Salween River [Smith and Xie 2008]), Thailand, Lao PDR and Viet Nam. Both populations are widespread but patchily distributed. The northwestern population ranges from around 50 to 2,500 m asl (Molur et al. 2005), while the southeastern population occurs from about 200 to 1,500 m asl.