[2][3] It is endemic to Vietnam and is only known from the area of its type locality, Ngoc Linh Nature Reserve in Đắk Glei District, Kon Tum Province.

[2] Mount Ngoc Linh and adjacent peaks form an isolated high-elevation area and the species is unlikely to exist elsewhere.

Skin texture varies from almost completely smooth to having scattered low tubercles.

All adult males were found in tree holes, the breeding habitat of this species.

[4] However, Rowley and colleagues suggest that it would qualify as "endangered" because of its restricted range (extent of occurrence likely less than 1000 km2), within which deforestation leading to habitat loss is occurring.