A male. These often perch on shrubs or dried vegetation near yucca buckwheat hoping to attract females.
This 'Loki' Juniper Hairstreak was photographed at Plum Canyon in Anza-Borrego Desert State Park on 3/23/2014.
This Becker's White was photographed at Yaqui Well in Anza-Borrego Desert State Park on 3/24/2016.