Rethera brandti, the lesser madder hawkmoth, is a moth of the family Sphingidae. The species was first described by Otto Bang-Haas in 1937. It is found from south-eastern Turkey and north-eastern Iraq to southern Iran along the Zagros Mountains and then into western Pakistan.
The wingspan is 40âÂÂ46 mm. Adults of ssp. brandti are on from April mid-May in one generation per year. Adults of ssp. euteles are on wing from late March to mid-May depending on the altitude in one or two generations per year.
The larvae probably feed on Galium species.