Wyoming-state-butterfly
Guides
Callophrys sheridanii
Sheridan's Hairstreak, Sheridan's Green Hairstreak
A small, tail-less hairstreak butterfly with a wingspan of 20–24 mm, recognized by the characteristic straight white line crossing the underside of both wings. The species exhibits variable underside coloration from bright green to dark gray-green. It was designated the state butterfly of Wyoming in 2009. The species occupies a broad elevational range and shows significant geographic variation in wing pattern expression.