Last modified: Oct. 23, 2023, 3:29 p.m.
A very rare species in Belgium, not seen for a long time. (last known record Hasselt (LI), 1948)
Wingspan: 24–25 mm. This species is very similar to the generally slightly larger and lighter and more yellowish-colored Cyclophora punctaria) and can hardly be distinguished from it based on the wing characteristics. The forewing and hindwing have the same orange-brown ground color with dense dark red speckles and a thick, dark red central transverse line. This middle transverse line bends inwards near the leading edge of the forewing so that it ends perpendicular to it. The second generation is always smaller.
The species overwinters as a pupa attached to a branch or twig of the host plant. The adults come to light.
The moths are on the wing from late April/late May in one generation, sometimes a partial second generation occurs from late July to early August.
The monophagous larva lives on Quercus.
It frequents light oak groves, particularly downy oak groves, and well-exposed hillsides.