As this is a cleptoparasitic species, all flower visits will be for nectar only.
Flowers visited: Ranunculus bulbosus (Ranunculaceae);Cerastium, Spergularia rubra (Caryophyllaceae); Hypochoeris radicata and Crepis (Asteraceae).
Celary (1995) lists the following nectar sources: Potentilla verna (Rosaceae); Vicia cassubica (Fabaceae); Veronica chamaedrys (Scrophulariaceae); Knautia arvensis (Dipsacaceae); Achillea millefolium, Senecio vernalis, Hieracium pilosella (Asteraceae)