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Arctic Grayling

Oeneis bore

  • Family: Brushfooted Butterflies – Nymphalidae
  • Subfamily: Browns – Satyrinae
  • Wing span: Medium-sized, 30–50 mm (1.17–2 in.). Females larger than males.
  • Wing upper side: Male forewing brown, hind wing beige-brown. Females’ wings more yellowish beige. Basal part of both genders’ hind wing darker than outer part. Hind wing margin with dark wavy pattern.
  • Wing underside: Male forewing brownish beige, females with yellowish beige, both black-mealy. Hind wing a combination of black and white, with clear or unclear dark strip.
  • Habitat: Open gravels and sandy land at the top of fells. Also mountain birch woodland.
  • Flying time: Late June–mid-July in normal summers. Later in cool summers.
  • Overwintering form: Caterpillar (overwinters two seasons).
  • Larval foodplant: Different grasses (Poaceae), especially sheep’s fescue (Festuca ovina).
  • Endangerment: Near threatened.

Genus Oeneis is represented in Finland by 3 species. Of these, the Arctic and Norse graylings are Lapland species and the third, jutta Arctic, can be found across almost the whole country. Its typical habitat is the bare, treeless fells of the Lappish tundra.

The Arctic grayling always rests with its wings pressed against each other, making the upper side difficult to study without first catching it. In its habitat in northern Finland it can be confused with its relatives the jutta Arctic and Norse grayling, but the Arctic grayling lacks eyespots. Additionally, the jutta Arctic can be found further south and is larger.

Other species from the same genus
Other species from the same subfamily

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