Dicycla oo

Dicycla oo, the heart moth, is a species of moth in the family Noctuidae. It is found locally in Europe and is also present in Turkey, Transcaucasia, the Caucasus, Israel, Iran and Iraq. The forewing is pale yellow, lightly dusted with rust-coloured scales, with the veins, cross lines and outlines of the spots in the same rusty colour, and the wingspan is 32 to 39 millimetres. Several colour forms have been named, among them one that is wholly sulphur yellow and others with a darker base or a rusty band across the wing. The larva is black-brown with white flecks and feeds on the united leaves of oak, Quercus. Caterpillars can be found in May and June, the adults fly from June to August, and the species spends the winter as an egg.