The Weaver's Wave is a nationally scarce species, found only in the hillsides of Caernarvonshire and Merionethshire in north-west Wales.

Flight Season

Flies in June and July in one generation

Size and Family

  • Family - Waves (Sterrhines)
  • Small Sized

Conservation status

  • UK BAP:  not listed
  • Priority Species in Wales (‘Section 42’ list)
  • Nationally Notable

Caterpillar Food Plants

Probably Heathers. Other moorland plants may also be used but this requires confirmation.


Mountains and moorlands, often with rocky outcrops.


  • Countries – Wales
  • Only found in north-western Wales, and even here it is very local. Most often recorded in Caernarvonshire. There are additional records from Merionethshire and a single record from Montgomeryshire.
Weaver’s Wave - Stuart Read

Weaver’s Wave

Weaver’s Wave - Ben Sale

Weaver’s Wave

Weaver's Wave  (D Taylor)

Weaver's Wave (D Taylor)