Meadow Thistle (?) enjoyed by a Swallowtail

Meadow Thistle (?) enjoyed by a Swallowtail

Observation - Meadow Thistle (?) enjoyed by a Swallowtail. Description: There was quite a patch of these on a wet fen meadow. At least one Swallowtail seemed to like them!

There was quite a patch of these on a wet fen meadow. At least one Swallowtail seemed to like them!