Map-winged Swift Korscheltellus fusconebulosa
Map-winged Swift Korscheltellus fusconebulosa
Adult • Littleborough, Lancashire • © Ian Kimber

3.003 BF18
Map-winged Swift Korscheltellus fusconebulosa

(De Geer, 1778)

[Synonyms: Hepialus fusconebulosa]

Wingspan 30-35 mm.

Often associated with moorland, this species is generally distributed across the north and west of Britain, becoming more local to absent in the south and east.

Adult moths fly in June and July, and perhaps August in the north. Typically they show a distinctive map-like pattern on the forewings, from which the species gets its vernacular name. The form gallicus which occurs sparingly throughout the range is rather plainer in appearance with a single pale spot on each forewing.

The larvae live underground and feed on the roots of Bracken.

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