Michael W. Richards / Red admiral (Vanessa atalanta) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers, Somerset, England, UK, August.

Michael W. Richards / Red admiral (Vanessa atalanta) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers, Somerset, England, UK, August.

Michael W. Richards / Red admiral (Vanessa atalanta) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers, Somerset, England, UK, August.

Alex Hyde / Greenbottle (Lucilia caesar) feeding on Hemp agrimony (Eupatorium cannabinum) Strumpshaw Fen, Norfolk, UK, September.

Alex Hyde / Hoverfly (Helophilus pendulus) feeding on Hemp agrimony (Eupatorium cannabinum) Strumpshaw Fen, Norfolk, UK, September.

Stephen Dalton / Hoverfly (Eristalis arbustorum) on Hemp Agrimony (Eupatorium cannabinum) Sussex, UK

Stephen Dalton / Hoverfly (Eristalis arbustorum) taking off from Hemp Agrimony (Eupatorium cannabinum) Sussex, UK

Nick Upton / Hemp agrimony (Eupatorium cannabinum) with flower buds just opening, Creech Heath, Dorset, UK, July.

MYN / Marko Masterl / Hemp-agrimony (Eupatorium cannabinum) in flower, Slovenia, Europe, August. meetyourneighbours.net project

Ernie Janes / *** Two Small tortoiseshell butterflies (Aglais urticae) on Hemp agrimony (Eupatorium cannabinum) UK, August.

Ernie Janes / Small tortoiseshell butterfly (Aglais urticae) on Hemp agrimony (Eupatorium cannabinum) England, UK, August.

Ernie Janes / Small tortoiseshell butterflies (Aglais urticae) feeding on Hemp agrimony (Eupatorium cannabinum) England, UK, August.