Angelica sylvestris
Larvae of "D. norwegica" commonly feed on flies, other insects and spiders that are brought to them and chewed up by the adult wasps in paste form. The adult individuals will feed on nectar from" Angelica sylvestris", "Heracleum spondylium" and "chamerion angsutifolium". They generally prefer a sweeter taste. Larvae of "D. norwegica" have a single tooth that is used to feed on the paste. Once it feeds, the larvae will expel a sweet liquid, which the adult wasp consumes. "D. norwegica" also enjoys flowers of umbelifers such as the wild parsnip