Large Blue
Common NameLarge Blue
Scientific NamePhengaris arion
FamilyLycaenidae
SubfamilyPolyommatinae
Wingspan (mm)40
Wing Patternspotted
Primary Colorsblue, black, grey, white
HabitatUnimproved grasslands, chalk downlands, heathlands
Geographic RangeEurope, temperate Asia
Host Plantswild thyme, marjoram, Myrmica ant larvae
Flight PeriodJune to August
Flight Stylefluttering
Conservation Statusnear-threatened
Lifecycle NotesLarvae feed on host plant flowers, then drop to the ground and are adopted by specific Myrmica ant species, feeding on ant larvae inside the nest through winter before pupating.
Identification TipsLook for the distinctive row of black spots on the upper forewing and the pale grey underside with prominent black spots ringed in white. Often found in specific habitats with wild thyme/marjoram and Myrmica ants.
Description
A medium-sized blue butterfly with iridescent blue upperwings marked with a row of black spots and a black border, and a pale grey underside with distinct black spots ringed in white.
