About Callophrys affinis (Edwards, 1862)
Callophrys affinis, commonly known as the western green hairstreak or immaculate green hairstreak, is a butterfly of the family Lycaenidae. It is found in western Canada and the western United States. Its wingspan measures 20 to 28 millimeters. Adults fly in a single generation from early March to mid-June. The larvae of this butterfly feed on Eriogonum umbellatum.