Western Pine Elfin, Callophrys eryphon. Caterpillars feed on young needles of hard pines including lodgepole pine (Pinus contorta), limber pine (P. flexilis), and ponderosa pine (P. ponderosa).
The juniper hairstreak or olive hairstreak, Callophrys gryneusis, is a small butterfly native to North America. It belongs in the family Lycaenidae - t so-called "gossamer-winged butterflies" which represent about 30% of the known butterfly species. The family is traditionally divided into the subfamilies of the blues (Polyommatinae), the coppers (Lycaeninae), the hairstreaks (Theclinae) and the harvesters (Miletinae). Adults are small, under 5 cm usually, and brightly coloured, sometimes with a metallic gloss.