Empetrum nigrum
The species flies in a single brood from June to August depending on location. The larvae feed on "Calluna vulgaris", "Vaccinium uliginosum", "Empetrum nigrum" and various Fabaceae species (mainly "Cercis siliquastrum", "Melilotus albus", "Lotus corniculatus", "Cytisus", "Genista tinctoria", "Trifolium pratense", "Chrysaspis campestris", "Astragalus alpinus" and "Anthyllis"). They are usually attended by ants ("Lasius" and "Formica" species). Second-stage of the caterpillars overwinter.