Traditionally, the range of N. gabriellae includes northeastern Cambodia, south of Ratanakari province, and southern Viet Nam, south of Bach Ma. The range here extends further to the north to include animals that, at least phenotypically (coloration), are N. gabriellae, to include southern Lao PDR, as far north as Savannakhet and to Thua Thien Hue province (and possibly Quang Tri province) in central Viet Nam (Geissmann et al. 2000).