Life Cycle and Food Plants
Common Rock-rose Helianthemum nummularium is the favoured foodplant on Calcareous soils. In other habitats Dove-foot Cranesbill Geranium molle and Common Stork's-bill Erodium cicutarium are used and possibly other Geranium spp. as well. Eggs are laid singly on the underside of leaves. The typically slug-like lycid larvae are green with a pale line along each side and always attended by ants. They hibernate as fully grown larvae and pupate the following spring. There are two broods a year in the southern colonies with adults on the wing in May and June and again in late July till mid September but further north they are single brooded and fly in June and July.
Read more about this topic: Brown Argus
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