Univoltine, with an extended flight period. Females fly from mid April to mid September, males from the beginning of July to late September. In Switzerland, the species may persist into mid-October (Amiet et al., 2001)
Label data from a few Spanish specimens show that females are active in (at least) June, July and August, and males are active in August. (Ortiz-Sanchez & Pauly, 2017)
Parasites None confirmed for the British Isles.
In mainland Europe, Sphecodes monilicornis has been recorded as a cleptoparasite of the species (Alfken, 1913) and this association may exist in the United Kingdom and Ireland.