Synemon nais, the orange sun-moth, is a moth in the Castniidae family. It is found in Australia, including Victoria, South Australia[1] and south-eastern Western Australia.
The wingspan is about 27 mm for males and 30 mm for females.[2]
Adults are on wing from mid-October to mid-November.
The larvae probably feed on Austrodanthonia setacea and Austrostipa species.