The only flower visits in Britain are tufted vetch (Vicia cracca)(Baker 1964), bush vetch (Vicia sepium) (J C Felton, pers. comm.) and “pink clover” (Trifolium cf pratense) (specimens in the Natural History Museum, London). In Europe, it has been recorded visiting members of Asteraceae, Boraginaceae, Caryophyllaceae, Cruciferae, Euphorbiaceae, Lamiaceae, Oleaceae, Ranunculaceae and Solanaceae (Móczár 1954). Males of E. nigrescens are known pollinators of the bee orchid and late spider-orchid on mainland Europe (see notes for this behaviour in the E. longicornis profile).