Frosted Elfin
Common NameFrosted Elfin
Scientific NameCallophrys irus
FamilyLycaenidae
SubfamilyTheclinae
Wingspan (mm)27
Wing Patterncryptic
Primary Colorsbrown, grey, white, dark brown
HabitatPine barrens, oak savannas, open woodlands, sandy clearings
Geographic RangeEastern North America, from southern Maine west to Wisconsin, and south to Florida and eastern Texas
Host Plantswild lupine, wild indigo, Baptisia species, Thermopsis
Flight PeriodMarch to May
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on host plant buds or young leaves. Larvae are green with white stripes, pupating in leaf litter or soil and overwintering as pupae.
Identification TipsKey features include its small size, dull brown upperside, and the distinctive underside hindwing pattern with a dark brown patch and a 'frosted' white patch near the outer margin. It lacks tails, unlike many other hairstreaks.
Description
A small, dull brown butterfly with a cryptic underside. The hindwing underside features a mottled brown and gray pattern with a prominent dark brown patch and a distinctive 'frosted' white patch near the outer margin.
