Last modified: Aug. 28, 2020, 10:27 a.m.
A rare and local species in Belgium; more frequently observed in the southern part of the country.
Reddish orange, oval and flattened.
Young larvae are white, head capsule black, prothoracic plate white. The full-grown larva is pale green with a darker green dorsal line, head capsule yellowish green, prothoracic plate green with some brown laterally.
The eggs are oviposited in small groups of up to eight eggs on the twigs of the larval host plant.
The larva constructs a silken tube made by rolling a leaf-edge downwards. At night, it leaves this tube to chew holes in the nearby leaves. Larvae can be found from May till early September.
Pupation takes place within a cocoon amongst detritus on the ground. The species hibernates in the pupal stage. Pupae can be found from September till early April.
One generation a year: March–April.
Mature Betula woodland, old forests with a lot of Tilia trees.