About Thecla johnsoni Skinner, 1904
Callophrys johnsoni, commonly known as Johnson's hairstreak, is a butterfly species belonging to the family Lycaenidae. This species is found in North America, ranging from British Columbia in the north down to central California in the south. Its preferred habitat is coniferous forests. The wingspan of adult Johnson's hairstreaks measures between 25 and 30 mm. Adults are active on the wing from May to July, and they produce only one generation each year. The larvae of this butterfly are specialist feeders, feeding exclusively on dwarf mistletoes. This includes the species Arceuthobium campylopodum and Arceuthobium tsugense.
