As this is a cleptoparasitic species, all flower visits will be for nectar only.
Known nectar sources include Frangula alnus (Rhamnaceae); Calluna vulgaris (Ericaceae); Thymus pulegioides (Lamiaceae); Daucus carota (Apiaceae); Tanacetum vulgare, Solidago canadensis (Asteraceae)(Westrich, 1989).