Great Purple Hairstreak (LEP44) Atlides halesus
Its other name, Great Blue Hairstreak, may be more suitable. The upperside is the deepest, most brilliant iridescent blue, on the body as well as the wings. A black border outlines the wings and greenish reflections may show, especially in the spots near the long tails. Our largest hairstreak. Its caterpillars feed on mistletoe, parasites of oak trees.