White-letter Hairstreak (Satyrium w-album)



A small brown butterfly, with a thin black line followed by an orange band and white lines, that form the letter W on the hind under-wing.

White-letter Hairstreak (Satyrium w-album) on Marjoram

White-letter Hairstreak on Marjoram


  • Family Group: Lycaenidae (Blues).
  • Where: Through-out Southern and Central England.
  • Habitat: Woodland rides and hedgerows with Elm trees.
  • Family Group: Lycaenidae (Blues).
  • When: Flying where found in largest numbers from July – August.
  • Size: 25-36mm.
  • Larval Food Plant: The blossom and early buds of Elm trees.
  • Adult nectar Plants: When not in tree tops adults may nectar on Bramble Flowers, Wild Marjoram (Origarnum vulgare), Thistles.
  • Population Status: Due to loss of habitat and falling numbers the White-letter Hairstreak is a priority species for conservation.
  • Photographed: 15th July (Macro).
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