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The Marsh Fritillary Butterfly (Euphydryas aurinia) is of the family Nymphalidae which is in the genus Euphydryas. It has a wide distribution in the Palearctic region and is protected under Annex II of the European Union Habitats and Species Directive. The gregarious larvae overwinter in a silken web formed at the base of the larval host plant Devil’s-bit Scabious (Succisa pratensis). In mid March they emerge from hibernation and disperse prior to pupation in late April. Three to four weeks later, the adults appear and are on the wing until late June or early July. After mating the female lays batches of up to 300 eggs on the underside of the leaves of the host plant The larvae hatch in mid June and then form a new silken web from which they feed on the leaves of the host plant before the hibernation period begins.
Patrick J. O'Keeffe / Raw Birds