Moor-Birke
The larvae feed on "Betula humilis", "Betula nana", "Betula pendula" and "Betula pubescens" (including "Betula pubescens carpatica"). They mine the leaves of their host plant. The mine consists of a slender corridor that hardly widens. The first part is filled with frass. The mine mostly follows a vein over a long distance, but the larva is capable of crossing thick veins, even the midrib.