Opistoclanis is a genus of moths in the family Sphingidae, containing only one species Opistoclanis hawkeri.
which is known from Yunnan in China, north-eastern Thailand, Laos and northern Vietnam, where it has been recorded at elevations between 888 and 2,800 meters.[1]
Adults are on wing from late March to early May at the end of the dry season in Thailand.