Metallic-green-underside
Guides
Callophrys affinis
Western Green Hairstreak, Immaculate Green Hairstreak
Callophrys affinis is a small butterfly in the family Lycaenidae, commonly known as the western green hairstreak or immaculate green hairstreak. It is found in western North America from western Canada through the western United States. Adults fly in a single generation from early spring to mid-summer. The larvae feed specifically on Eriogonum umbellatum.