Last modified: Feb. 17, 2022, 6:05 p.m.
A very rare and local species in Belgium.
The adults fly in May and June. During the day, they rest on the lower branches or trunk of the tree and becoming active after sunset. They come to light.
The larva feeds and tunnelling in the bark of Picea and rarer in Larix and constructing a silk-lined gallery. The full-grown larva hibernates and pupate in the larval habitation in a silken cocoon.