Last modified: March 15, 2024, 11:09 a.m.
A rare and local species in Belgium.
Native
The young larva makes a linear mine in the leaves of the food plant, creating an irregular whitish elongate blotch. Later it cuts out an oval case and drops to the ground.
Pupation in the case on the ground.
The moths are sometimes active during the day, flying around small birches. They come to light.
The adults fly from May to early July.
The larva lives on Betula spp.