Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Dusky Heath (Coenonympha dorus) is a butterfly of the Nymphalidae family. It is found in South-Western Europe and North Africa. The length of the forewings is 16-17 mm. The butterfly is on wing from June to August. A butterfly is a mainly day-flying insect of the order Lepidoptera, the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. The larvae feed on various grasses.