Last modified: Jan. 16, 2020, 2:42 p.m.
A rather rare species in Belgium. Is sometimes easily confused with Incurvaria koerneriella.
The adults fly in May and June. The moths are active in the afternoon sunshine. They come to light in small numbers.
Eggs are laid inside Betula twigs, usually at a node, and the larva feeds and eventually pupates inside a thick white cocoon inside the gall as well, were it hibernates.