Callophrys viridis, the coastal green hairstreak, is a species of butterfly in the family Lycaenidae.

[1] The eggs are light green and are deposited singly on the leaves of the host plant.

[2] The Larvae are whitish with pink markings, but become a reddish colour shortly before pupating.

[2][3] The adults are known to feed on nectar from Fragaria chiloensis, Armeria maritima, and Erigeron glaucus.

In 2012, ICZN Opinion 2291 designated a neotype for C. dumetorum and reverted the name changes for both species.