Rana aenea Smith, 1922 Chaparana aenea (Smith, 1922) Rana fansipani Bourret, 1939 Chaparana fansipani (Bourret, 1939) Nanorana fansipani (Bourret, 1939) The Doichang frog (Nanorana aenea) is a species of frog in the family Dicroglossidae.

[2][3] It is only known from its type locality, Doi Chang, mountain north of Chiang Mai (Thailand), Fansipan mountain in northern Vietnam (type locality for the now-synonymized Rana fansipani), and Huanglianshan National Nature Reserve in Yunnan, China.

[2][4] Adult males of Doichang frog are 65–77 mm (2.6–3.0 in) in snout-vent length and have spines in several parts of their bodies, a male secondary sex characteristic.

[4] Its natural habitats are subtropical or tropical moist montane forest and rivers.

It is potentially threatened by habitat loss, more so in Vietnam[5] than in Thailand.