Thermozephyrus ataxus, the wonderful hairstreak,[4] is a small butterfly found from India to Japan that belongs to the lycaenids or blues family.

The butterfly was previously classified as Thecla ataxus Doubleday.

[5] It is also presently classified as Chrysozephyrus ataxus.

[6] The species occurs in Murree (Pakistan), and in India from Jammu and Kashmir to Kumaon and in the Naga Hills.

[5] In general, the range extends from the western Himalayas to China and Japan.