Difficult to distinguish from the Lesser Treble-bar, although usually slightly larger. The angle of the basal cross-line is often slightly obtuse and not acute. In the male the tip of the abdomen is pointed and not blunt. Easily disturbed by day. Flies from dusk and after dark.

Size and Family

  • Family – Carpets and Allies (Larentiines)
  • Medium Sized 

Conservation status

  • UK BAP: Not listed
  • Common

Particular Caterpillar Food Plants

St John’s-worts.

Distribution

  • Countries – England, Wales, Scotland, Ireland
  • Reasonably well distributed over Britain and Ireland, including the Hebrides and Orkney. Recorded on the Isle of Man and rare on the Channel Islands.

    Habitat

    Found in a range of habitats, including gardens, field margins, heathland, moorland, woodland rides, calcareous grassland, sand dunes and sea-cliffs.

    Treble-bar - Garry Barlow

    Treble-bar

    Treble-bar - Heath McDonald

    Treble-bar

    Treble-bar - Patrick Clement

    Treble-bar

    Treble-bar (underside) - Iain Leach

    Treble-bar (underside)

    Treble-bar - Ben Sale

    Treble-bar

    Treble-bar - Clive Jones

    Treble-bar

    Treble-bar - Clive Jones

    Treble-bar

    Treble-bar - Garry Barlow

    Treble-bar