A rather rare species in Belgium. Known from six provinces, recent observations only in four of them.

The larva lives in a long gallery leading to a blotch on the leaves of Epilobium angustifolium. It readily changes leaves. The blotches when fresh are yellowish in colour, but they bleach rapidly after the larvae have vacated them. Pupation in a cocoon amongst detritus on the ground.

The adults fly in two generations a year in May-June, and again in late July and August.