Silver washed Fritillary

Habitat: Sunny, shrub-lined clearings in forests or along forest edges, usually with flowering brambles or other nectar plants.

Appearance: Found in large parts of Europe. One population in north-western Belgium, but more numerous in south-eastern Belgium. Extinct in the Netherlands, but strays are sometimes observed (there are reports that the number has increased).

Flying time: One generation. Late May to September, depending on location.

Characteristics: Wingspan 55-60 mm.

Life cycle: Host plant is from the violet family (Violaceae), such as hairy violet (Viola hirta). The female does not lay her eggs on the host plant but on tree trunks near violets. She looks for cracks and crevices and lays one egg every half metre to one metre. The caterpillars hatch in early summer and hibernate without food. They become active the following year from March onwards. The caterpillars are active at night and hide under leaves during the day. Pupation takes place on a twig close to the ground. The adult butterflies feed on nectar from various flowering plants. Important nectar plants include Hemp-agrimony, Oregano, Brambles and thistles. They also feed on honeydew and are sometimes observed on rotting fruit.