Last modified: March 31, 2023, 1:45 p.m.
A not so common and local species throughout Belgium.
This species, having a wingspan of 20–33mm, has the forewings with two more or less parallel pale fasciae that are white in the males and pale golden-fuscous in the the less contrasting coloured females. It has short antennae and no functioning mouthparts and therefore cannot feed.
The caterpillar is whitish grey and the skin is wrinkled. The shiny head is maroon-brown and, both dorsally and laterally, there are small gray-brown plates on the thoracal segments. The small stigmata are blackish.
Females of this species scatter their eggs over plants as they fly over them in a suitable biotope. The larva feeds on the roots and subterraneous stem-parts of mainly Pteridium aquilinum. In the last instar it feeds on young shoots at surface level. This species, hibernating twice as a larva, pupates in the ground. It is one of the few species were the males lure the females by spreading a pineapple-like odour.
The adults are active from dusk onwards and later come sparingly to light.
The adults fly from mid May till the end of July but the main flight period is in June.
This species occurs especially in open forests with an undergrowth of grasses, ferns or dwarf shrubs. It can also be found in thickets, heaths and rugged grasslands.