© Alan Martin
Polyommatus bellargus (Rottemburg, 1775)
A bivoltine species flying from April to September but often until November further south. A species of dry grassy habitats it has been recorded from the ridge at Las Descargues but is far more common at lower altitudes on the Causse.
The two principal larval foodplants are Hippocrepis comosa, Coronilla varia. Hibernates as a small larva and is attended by various ant species Lasius alienus, L. niger, Plagiolepis pygmaea, Myrmica, Tapinoma spp. with pupation taking place close to the entrance to the ant's nest in plant detritus or under stones.