Adonis Blue
Common NameAdonis Blue
Scientific NamePolyommatus bellargus
FamilyLycaenidae
SubfamilyPolyommatinae
Wingspan (mm)35
Wing Patterniridescent
Primary Colorsiridescent blue, black, white
HabitatCalcareous grasslands, chalk downlands, unimproved grasslands
Geographic RangeWestern Europe, Central Europe, extending east to Turkey and the Caucasus
Host PlantsHippocrepis comosa (Horseshoe Vetch)
Flight PeriodMay to June, August to September (bivoltine)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on the host plant, Horseshoe Vetch. The larvae are green, flattened, and have a symbiotic relationship with ants (myrmecophilous). Pupation occurs at the base of the host plant.
Identification TipsMales are distinguished from similar blue butterflies by their intense, deep iridescent blue upperside and the absence of dark venation. Females are brown with orange spots and some blue basal dusting, often requiring examination of underside spot patterns for accurate identification.
Description
The male Adonis Blue is renowned for its brilliant, iridescent sky-blue upperwings, framed by a thin black border and white fringe, while the underside is grey-brown with distinct black spots ringed in white.
