Callophrys siva juniperaria
Siva Juniper Hairstreak
Like the closely-related loki, this hairstreak uses California Juniper and is multiple-brooded (said to be March-April, June-July, with a fall emergence possible with sufficient summer rains. In contrast to loki, this butterfly has a decidedly green underside wing color (which is structural, not pigmented, in these butterflies). Juniperaria can be found along the northern side of the San Gabriels and San Bernardino Mountains in the high desert, where juniper thrives. Bob's Gap is a classic habitat to look for this butterfly (I've seen a few in April); Mint Canyon is the type locality. Its range extends north to the Tehachapis, Piutes, and the Upper Kern River (acc. to Ken Davenport).