Hyles dahlii is a moth of the Sphingidae family. It is found on Corsica, Sardinia and the Balearic Islands. On rare occasions it is found on Sicily and along the north-eastern coast of Spain. It was introduced to Tunisia in the mid 1980s. The wingspan is 65–85 mm. Adults are on wing from May to June and from August to September in two generations. The larvae feed on various herbaceous plants, including Euphorbia paralias, Euphorbia myrsinites, Euphorbia characias, Euphorbia dendroides, Euphorbia pityusa, Euphorbia pinea and Euphorbia terracina.