The pale brown forewing with the two brown edged, silvery cross-lines and the dark central spot are characteristic. Readily disturbed from bracken or other vegetation by day. Flies from dusk and after dark.

Overwinters either as a pupa. Larva from mid June to September.

Size and Family

  • Family – Thorns, Beauties and allies (Ennomines)
  • Small Sized 
  • Wingspan Range - 31-37mm

Conservation Status

  • UK BAP: Not listed
  • Common

Caterpillar Food Plants

Bracken (Pterdium aquilinum).


Most places where the foodplant occurs, particularly heathland, moorland and woodland.


  • Countries – England, Wales, Scotland, Ireland
  • Widely distributed, and sometimes abundant, throughout much of England, Wales and lowland Scotland, found north to Caithness.
  • Distribution Trend Since 1970’s = Britain:Stable
Brown Silver-line by Les Hill

Brown Silver-line