BREEDING: In July or August, adult butterflies lay a cluster of 10 to 100 eggs on the New Mexico penstemon, a beautiful plant endemic to the state's Sacramento Mountains. Larvae hatch and begin ...

DESCRIPTION: Adult Thorne's hairstreak butterflies have wingspans of about one to 1.2 inches ... the new growth of established Tecate cypress host plants and incubate for seven to 14 days. Pupation is ...