A bivoltine species: the first brood from mid March to late May or early June, the second brood from late June or early July to late September. Some freshly emerged examples collected in the first half of June are assumed to be second brood individuals.
Dardón Peralta (2010) shows activity in 2 generations in Spain, flying from March to September
In Thessaly (Greece), Standfuss et al. (2011) report flight activity from March to August
Parasites The bee Nomada flavoguttata is cited as a cleptoparasite of this species (Kirby, 1802; Söderman & Leinonen, 2003; Amiet, 2010).