Ábrahám Levente – Farkas Sándor: Butterflies along the river Drava, 2008

Forest margins are more species-rich than closed forests. Caterpillars of the following two species live on forest shrubs. Blue-spot hairstreak (Satyrium spini) [46] is a characteristic species of brown coloured hairstreaks, and can be easily distinguished from similar related species on the basis of the pattern on its hindwings. Its caterpillars develop on blackthorn, in forest edge habi tats. Another species found commonly along Drava is marbled fritillary (Brenthis daphne) [47]. There is an extensive violet-coloured pattern on the underside of its hindwings. Its caterpillars feed on blackberry fruiting prolifically in the forest edge.