Univoltine, with an extended flight period. Females from early April to October; males from early July to the beginning of October. G.M. Spooner (pers. comm.) found several active gynes on the Dorset coast in mid February.
Label data from Spanish specimens shows that females are active from March to September, and males from June to September (Ortiz-Sanchez & Pauly, 2017). Mavromoustakis (1948; 1951; 1952; 1954) reports activity in February and March and from June to October.
Parasites L. Packer (pers. comm.) has excavated the cleptoparasite Sphecodes monilicornis and larvae of the meloid beetle Meloe ?proscarabaeus from nest burrows of this bee on the Isle of Wight (GB).
In Germany, Westrich (1989) also cites Sphecodes punctceps as a possible cleptoparasite.