Sirhowy Hill Woodlands

Scientific name: Hepialus fusconebulosa

Map-winged Swift

Late May to early July or early August in the north. Locally distributed throughout Great Britain. Named after the distinctive map-like markings on the forewings of the most frequent form f. gallicus.

The adults have short antennae and have no functioning mouthparts so cannot feed. The caterpillars can be found from July to the following May, overwintering twice underground as larvae so the life cycle takes two years to complete.

What do Map-winged Swifts eat?

Most often Bracken roots (Pteridium aquilinum) but also the roots of Red Fescue (Festuca rubra) where Bracken is absent.

What habitat does the Map-winged Swift live in?

Map-winged Swifts live in moorland, rough pasture, heathland and open woodland.

What family does the Map-winged Swift belong to?

Map-winged Swifts belong to the Swift moths (Helialidae) family.

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Scientific Name

Hepialus fusconebulosa


England, Wales, Scotland and Ireland


Medium Sized

Wingspan Range: 28-52mm


Local (only found in some areas)

Other Wildlife