Last modified: Nov. 17, 2023, 4:43 p.m.
A fairly common species throughout Belgium.
Wingspan 16–20 mm. The posterior edge of the dark area in A. betuletana is straighter so that it does not reach so far back along the costa as in A. capreana or A. turbidana.
The central pale deviation into the dark area is also less pronounced in A. betuletana and it can have a light ochreous clouding in the pale area.
The larva feeds during May-June on the host plant and spinning together two or three leaves. It pupates in the larval habitation or among leaf-litter on the ground. The species hibernates in the egg stage.
The adults are active at dusk and later come to light.
The adults have been observed from the end of May till late October with a peak during August.
The larva feeds on different species of Betula.
Woods, woodland margins, heaths and gardens where birch occurs.