Univoltine, but with an extended flight period. The overwintering females emerge at the end of April or in early May and the males fly from the beginning of July to early October.
Label data from Spanish specimens shows that females are active from April to July, and the males from July to September (Ortiz-Sanchez & Pauly, 2017).
In Poland, females fly from June to late August, and the males in August (Pesenko, Banaszak et al., 2000).
Parasites: Unknown (Westrich, 1989)