Common Blue
Image: Hans Frank (Public domain)
Common NameCommon Blue
Scientific NamePolyommatus icarus
FamilyLycaenidae
SubfamilyPolyommatinae
Wingspan (mm)32
Primary Colorsblue, black
HabitatMeadows, grasslands, heathland, gardens, forest clearings
Geographic RangeEurope, North Africa, temperate Asia
Host PlantsBird's-foot Trefoil (Lotus corniculatus), clovers (Trifolium spp.), medicks (Medicago spp.)
Flight PeriodApril to October (multiple broods)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on host plant leaves. Larvae are small, green, and often associated with ants. Pupation occurs near the ground in leaf litter or at the base of host plants.
Identification TipsMales are typically bright blue with a narrow black border. Females vary from blue to brown, often with orange spots along the hindwing margin. The underside features characteristic black spots with white rings and orange lunules.
Description
A small butterfly with vibrant iridescent blue uppersides on the wings, bordered by a thin black line, resting on a blade of grass.
