The forewings of this species have a greyish or greenish-white ground colour, marbled with green, grey or yellowish marbling. The colours and markings are variable but easy to recognise.

The larvae feed on lichens growing on walls, roofs, rocks and are often associated with old buildings.

Pupates in moss or a crevice.

Urban areas and coastal cliffs.

Recorded in 89 (33%) of the 270 2km squares of Huntingdonshire.

Last recorded in September 2019

Recorded date range (Adult): 14 June to 26 September

Recorded date range (Larva/Leafmine): 30 April to 30 April