Last modified: Oct. 1, 2020, 12:23 p.m.
A rare species in Belgium, but probably overlooked.
The autumn generation is greyish brown with some very small costal dots. The summer generation is brownish with a yellowish, trapezoid spot in the middle of the costa. This spot is sometimes vaguely visible in the autumn generation as well.
Whitish with light brown head capsule.
The free living instars turn the leaf edge downwards and spin it into some kind of flap. This flap is changed two to three times. In some rare cases the leaf edge is turned into a real leaf roll. The species hibernates in the adult stage. The moths are very elusive and not often seen.
The adults fly in one generation a year: emerging during September, overwintering and then flying until May.
The monophagous larvae feed on Alnus glutinosa.