Last modified: July 16, 2024, 5:31 p.m.
Status and distribution in Belgium insufficiently known, but it is assumed that this is a rare species.
Distribution after 2004 is based on individuals who have been examined for genitalia.
Native
Wingspan 22–27 mm. The strength and placement of the 3 dots forming the first line is characteristic and is usually sufficient to identify this species, the dorsal dot is the most elongate and the most distal, the middle and costal dots are transverse and often fused, although a check of the genitals is advised, especially in worn specimens.
The larva lives inside the seed-heads of the food plant and hollows out a large cavity therein. It hibernates in a tough brown cocoon on the ground amongst debris.
The adults are active from dusk onwards and later come to light.
The adults fly from June towards September.
The larva lives on Cirsium vulgare.