Prunus padus
Habitat: Wetland and open ground; fen, humid, grassland, and along streams in open country, unsown fallow land. Flowers visited include white umbellifers, "Caltha", "Convolvulu"s, "Euphorbia", "Prunus padus", "Ranunculus", "Salix repens", "Taraxacum", "Tussilago", "Ulex". The flight period is May to September (April to October in southern Europe).