Bivoltine in southern parts of its range (the first one flies from April to May, and the second one from July to August) but univoltine in Britain: the end of June to early September
Schmid-Egger and Doczal distinguish 2 species, bivoltine A. fulvicornis and univoltine A. nitidiuscula
Parasites: The bee Nomada errans is cited as a cleptoparasite of this species (Westrich, 1989; Else, in prep.).