Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Cranberry Fritillary (Boloria aquilonaris) is a butterfly of the Nymphalidae family. It is found in Northern and Central Europe. The wingspan is 34-40 mm. The butterfly flies from June to August depending on the location. The larvae feed on Cranberry and Andromeda polifolia.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.