Among the numerous herbaceous flora that occur in the Faroe Islands is the Marsh Thistle, Cirsium palustre.
The insect can also be very common where there are creeping thistles (Cirsium arvense) or swamp thistles (Cirsium palustre), oregano (Origanum vulgare), Forest scabious (Knautia sylvatica), or hogweed (Heracleum sphondylium) which are favourite foodplants of the imagos.
The adults feed on nectar and pollen (mainly on Valeriana officinalis, Geranium sylvaticum, Centaurea jacea, Cirsium palustre, Epilobium angustifolium, etc), with preference for blue flowers.
Cirsium | Cirsium arvense | Cirsium palustre | Galium palustre | The plants of the peat moss ''Shagnum palustre'' multiplied in this bioreactor | Cirsium occidentale | Cirsium eriophorum | Cirsium acaule | A mined leaf of ''Cirsium vulgare |