Eros Blue
Common NameEros Blue
Scientific NamePolyommatus eros
FamilyLycaenidae
SubfamilyPolyommatinae
Wingspan (mm)32
Primary Colorspale blue, grey, orange, black
HabitatAlpine meadows, subalpine grasslands, rocky slopes
Geographic RangeSouthern Europe (Pyrenees, Alps, Balkans), Caucasus, Central Asia, Siberia
Host PlantsAstragalus, Oxytropis
Flight PeriodJune to August
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesEggs are laid on host plants, typically legumes. Larvae feed on leaves and flowers, often forming symbiotic relationships with ants. Pupation occurs near the ground.
Identification TipsKey features for identification include the pale blue-grey underside, the pattern of black spots ringed with white, and the prominent orange submarginal spots on the hindwings. Males have a vibrant iridescent blue upperside.
Description
A small butterfly with a pale grayish-blue underside, featuring numerous black spots ringed with white, and a distinctive row of orange crescents along the hindwing margin.
