Gray Hairstreak butterfly nectaring on an Upright Prairie Coneflower, Tishomingo National Wildlife Refuge, Oklahoma

Gray Hairstreak Butterfly Images, Facts and Information:

Strymon melinus

  • Gray Hairstreak butterflies are small, delicate insects with slate-gray wings, one white-edged black line near the base of the hindwing, and a slender tail-like projection on the hindwing. Both sexes have similar markings, with subtle variations in underwing spotting.
  • Gray Hairstreak butterflies are widespread residents across most of the U.S., southern Canada, Mexico, and Central America. Some northern populations migrate seasonally, while southern groups remain year-round.
  • Gray Hairstreak butterflies thrive in open habitats including meadows, fields, gardens, roadsides, forest edges, and disturbed areas with flowering plants. They adapt well to urban and suburban environments.
  • Gray Hairstreak caterpillars feed on flowers, fruits, and seeds of legumes (clovers, beans, peas) and mallows (cotton, hollyhock). Adults sip nectar from milkweed, dogbane, mint, and other small-flowered plants.
  • Females lay single greenish-white eggs on flower buds or young fruits. Caterpillars hatch in 3–5 days, pupate in leaf litter after 2–3 weeks, and emerge as adults 1–2 weeks later. Multiple generations occur annually in warm climates.
  • Gray Hairstreak butterflies are often called “Common Hairstreaks” due to their widespread abundance.
  • A group of hairstreaks can be called a “flutter”, “kaleidoscope”, or “wing” of butterflies
  • The typical adult lifespan is 1–2 weeks, though some individuals may live up to 3–4 weeks under ideal conditions. Exact longevity records are undocumented for this species.

I hope you enjoy viewing my Gray Hairstreak Butterfly photos.