Last modified: Dec. 4, 2024, 3:55 p.m.
A fairly common species throughout Belgium.
Native
Females lay eggs singly or in small groups along the veins on the leaves of the host plant and hatch in ca. 10 days. The eggs are creamy white, developing a purplish-red ring as the embryo develops.
Late instar larvae are approximately 13-15 mm in length. The caterpillar is almost white with gray dots, the head is light brown, the neck plate is the same color as the body with two larger dots on the side and two smaller dots at the back. Anal valve is brown.
The larva lives inside the acorns or the nuts on the host plant. Frass is expelled from the entrance holes. When the nuts fall from the tree, the fully grown larva exits and makes a hibernation cocoon in the litter or under the tree bark, or into the moss of the trunks.
Especially the males are active in early morning and in the late afternoon. They come to light.
The adults have been seen from May towards late September but usually fly from early June towards early August.
The larva feeds on Quercus sp., Quercus robur and Castanea sativa.
It inhabits woodland, scrub, parkland, heathland, fens and gardens.