Icaricia icarioides,^[1] or Boisduval's blue, is a butterfly of the family Lycaenidae found in North America. This butterfly has 25 recognized subspecies.^[2]

Their range extends throughout the western US and Canada from southern Saskatchewan to British Columbia.^[3] Its habitats include dunes, mountains, meadows, streams, and sage-lands. It is also found in open areas or openings in woods near its larval host.^[4]

Larvae feed on species of lupines (Lupinus).^[3] Adults feed on nectar from flowers of Eriogonum species and other composites.^[4]

Wingspan: 21 to 32 mm.^[3]

• Greenish blue (Icaricia saepiolus)
• Silvery blue (Glaucopsyche lygdamus)

• Icaricia icarioides albihalos^[5]
• Icaricia icarioides argusmontana^[6]
• Icaricia icarioides atascadero^[7]
• Icaricia icarioides austinorum^[8]
• Icaricia icarioides blackmorei – Puget blue^[9]
• Icaricia icarioides buchholzi^[10]
• Icaricia icarioides eosierra^[11]
• Icaricia icarioides evius^[12]
• Icaricia icarioides fenderi – Fender's blue^[13]
• Icaricia icarioides fulla^[14]
• Icaricia icarioides helios^[15]
• Icaricia icarioides icarioides^[16]
• Icaricia icarioides inyo^[17]
• Icaricia icarioides lycea^[18]
• Icaricia icarioides missionensis – Mission blue^[19]
• Icaricia icarioides montis^[20]
• Icaricia icarioides moroensis^[21]
• Icaricia icarioides nigrafem
• Icaricia icarioides panamintina^[22]
• Icaricia icarioides parapheres^[23]
• Icaricia icarioides pardalis^[24]
• Icaricia icarioides pembina^[25]
• Icaricia icarioides pheres (extinct)†^[26]
• Icaricia icarioides sacre
• Icaricia icarioides santana^[27]