From the NPS PORE website list.
The Spring Azure (Celastrina ladon) is a butterfly of the Lycaenidae family. It is found in North America from Alaska and Canada south of the tundra through most of the United States except the Texas coast, southern plain and peninsular Florida; south in the mountains to Colombia.
The Greenish Blue (Aricia saepiolus) is a butterfly of the Lycaenidae family. It is found from northwestern United States to southern Saskatchewan and Alberta.
The Acmon Blue (Plebejus acmon) is a North American butterfly. It ranges mainly in California but can be seen north to Oregon and south through Baja California. The tops of the wings are blue with dark edges in males and brown in females. Its underside is white with black spots for both sexes with a red-orange band on the hindwing. Adults feed on nectar while caterpillars can ...more ↓
The Western Tailed-blue (Cupido amyntula) is a member of the Lycaenidae family and is seen across western North America as far norther as Alaska. The upperside of the male butterfly is blue while the female has a darker brown band on the outer side of the wing. The underside is riddle with black spots, with a wingspan of 2.2 to 2.9 cm. The larvae feed on Thermopsis, ...more ↓