Univoltine, with an extended flight period. Females from mid March or early April to September or October, males from mid June to mid September.
Label data from a few Spanish specimens shows that females are active from (at least) May to July, and males in July (Ortiz-Sanchez & Pauly, 2017).
Parasites: The following aculeates have been listed in the literature as cleptoparasites of this species: Sphecodes geoffrellus [as S. affinis] (Morice, 1901; R.C.L. Perkins, 1923, 1924; Stelfox, 1927; Hallett, 1928), S. crassus [as S. variegatus](R.C.L. Perkins, 1923), Nomada sheppardana [as N. furva](R.C.L. Perkins, 1923; Hallett, 1928; Butterfield & Fordham, 1932) and the chrysidid wasp Chrysis ignita (Gardner, 1901c). The latter record is very doubtful. Specimens of both sexes of this bee are sometimes stylopised (e.g. F. Smith, 1876; Hallett, 1928; Butterfield & Fordham, 1932), possibly by Halictoxenus nitidiusculus (Oglobin, 1924).
Stubbs (2001), citing Verral, suggests that the bee-fly Bombylius canescens may be an inquiline in nests of this species.