Dolerus madidus - Sawfly Dolerus madidus orange colored with Black legs (Dolerus germanicus has the same color but orange knees) It larvas live on Juncus which can be found plenty in Kirchwerder , Hamburg, the location the photo was taken. © Aiwok - CC BY-SA 3.0 - Wikimedia Commons
Chastreix-Sancy - Foret de Cerisy - Lac de Remoray - Vallée de Chaudefour