Last modified: Oct. 3, 2021, 11:47 a.m.
A very rare and local species in Belgium, mainly known from the extreme south of the country. Nowadays not often observed.
Recently (2021) observed in WV, where different habitable populations occur in the far west. It is possible to observe this species in numbers there.
Hibernates as as a small larva and pupates in a loose spinning at the base of the food plant.
When conditions are favourable, a small partial second generation may occur from August till September filled up with occasionally migrants. They are active by day and night and come to light.
The adults fly usually in one generation a year; during June and July.
The larva lives in the stems of Ononis.