Appearance
Wingspan 31–38 mm.Forewing broadened towards the outer margin, bright glossy lead-grey with broad, regular, light yellow costal band, somewhat dulled at the apex, and pure yellow fringes; hindwing, head and neck and anal tuft of male ivory yellow. Beneath,the forewing is only suffused with sooty grey at the base and on the disc, so that a broad outer border is pale yellow. Hindwing pale yellow with a slightly dark costal margin.
Behavior
This moth flies at night in July and August and is attracted to light and nectar-rich flowers.Larva dark lilac-grey with black dorsal line and black head, bearing black and yellow hairs; subdorsal lines black, stigma-line orange. It usually feeds on various lichens including ''Parmelia'', although it has also been recorded feeding on buckthorn and oak. The species overwinters as a larva, hibernating, until the end of May. Pupa reddish brown.
glossy. According to Schmidt the larvae prefer the trunks of beeches and oaks, but " I often beat the moths out of the lower branches of high, solitary larches in the Alpine valleys; locally very common, especially in the mountains"
# ^ ''The flight season refers to the British Isles. This may vary in other parts of the range.''
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