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.

MYN / Dirk Funhoff / Common agrimony (Agrimonia eupatoria), Büchelberg, Pfalz, Germany. September. Meetyourneighbours.net project

MYN / Dirk Funhoff / Common agrimony (Agrimonia eupatoria), Büchelberg, Pfalz, Germany. September. Meetyourneighbours.net project

Andy Sands / Red admiral butterfly (Vanessa atalanta) feeding on nectar from Hemp Agrimony, Oxfordshire, England, 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

David Pike / Common agrimony (Agrimonia eupatoria) in flower, Green Down Nature Reserve, Somerset, England, UK, June.

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

Colin Varndell / Large white butterfly (Pieris brassciae) on Hemp agrimony flower. Hampshire, UK, August.

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.

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

Ernie Janes / Peacock Butterfly (Inachis io) on Hemp agrimony (Eupatorium cannabinum) England, UK, August.

Colin Varndell / Male silver-washed fritillary butterfly (Argynnis paphia) taking nectar from hemp agrimony flower, Dorset, UK. August

Pat Tuson / Hemp-agrimony (Eupatorium cannabinum) growing in field near the village of Bromeswell, Suffolk,

Terry Whittaker / 2020VISION / Red admiral (Vanessa atalanta) butterly and Buff-tailed bumblebee (Bombus terrestris) feeding on Hemp agrimony (Eupatorium cannabinum) flower, Strumpshaw Fen RSPB reserve, Norfolk, England, UK

Will Watson / Red Admiral (Vanessa atalanta) butterfly nectaring on Hemp agrimony (Eupatorium cannabinum), Herefordshire, England, UK, August

Steve Nicholls / Hemp agrimony (Eupatorium cannabinum) seed heads, UK

Nick Upton / The great waterfall (Veliki Slap) tumbling 70 metres down karst limestone cliffs at Plitvice Lakes National Park, with stands of flowering Hemp agrimony (Eupatorium cannabinum) in the foreground, Croa...

Will Watson / Tachinid fly (Tachina fera) on Hemp Agrimony (Eupatorium cannabinum), Herefordshire, England, UK

Colin Varndell / Hemp agrimony (Eupatorium cannabinum) flowering, Dorset, UK July

Dave Watts / Hemp agrimony (Eupatorium cannabinum) in flower, UK

Gary K. Smith / Painted lady butterflies (Vanessa cardui) feeding on Hemp agrimony (Eupatorium cannabinum), Norfolk, England, July.

Gary K. Smith / Painted lady (Vanessa cardui) feeding on Hemp Agrimony (Eupatorium cannabinum), Norfolk, England, July.

Gary K. Smith / Painted Lady butterflies {Vanessa / cynthia cardui} feeding on Hemp Agrimony {Eupatorium cannabinum} Norfolk, England, July

Stephen Dalton / Hamp agrimony (Eupatorium cannabinum) flowers, UK

Stephen Dalton / Hemp agrimony (Eupatorium cannabinum) flowers, UK

Simon Colmer / Agrimony (Agrimonia euratoria) flower stalk, Levin Down Nature Reserve, Sussex, UK

Philippe Clement / Hemp agrimony {Eupatorium cannabinum} France

Pascal Tordeux / Hemp Agrimony (Eupatorium cannabinum). Picardy, France, July.

David Kjaer / Hemp Agrimony {Eupatorium cannabinum} Wiltshire, UK

Guy Edwardes / Marbled white butterfly (Melanargia galathea) resting on Agrimony (Agrimonia sp.) flowerhead, Uplyme Devon, England, UK. July.

Nick Upton / Peacock (Aglais io) butterfly nectaring on Hemp agrimony (Eupatorium cannabinum) flowers, Strumble Head, Pembrokeshire, Wales, UK. August.

Nick Upton / Giant tachinid / Yellow-faced fly (Tachina grossa) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers, Strumble Head, Pembrokeshire, Wales, UK. August.

Will Watson / Hemp agrimony (Eupatorium cannabinum) on white background, Herefordshire, England, UK. August. Focus stacked under controlled conditions.

Will Watson / Hemp agrimony (Eupatorium cannabinum) on white background, Herefordshire, England, UK. August. Focus stacked under controlled conditions.

Nick Upton / Hemp agrimony (Eupatorium cannabinum) flowering in a dense stand in a hedgerow, Dorset, UK. August.

Nick Upton / Hemp agrimony (Eupatorium cannabinum) flowering in a dense stand in a hedgerow, Dorset, UK. August.

Philippe Clement / Female Tapered drone fly / Dronefly (Eristalis pertinax) pollinating and feeding on nectar from Hemp-agrimony (Eupatorium cannabinum) flower, Belgium. August.

Philippe Clement / Male Hornet mimic hoverfly (Volucella zonaria) pollinating Hemp-agrimony (Eupatorium cannabinum) flower in summer, Belgium. August.

Philippe Clement / Rosy footman moth (Miltochrista miniata) feeding on Hemp agrimony (Eupatorium cannabinum) flower, Belgium. August.

Philippe Clement / Red admiral (Vanessa atalanta) feeding on nectar from Hemp-agrimony (Eupatorium cannabinum) flower, Belgium. August.

Philippe Clement / Red admiral (Vanessa atalanta) pollinating Hemp-agrimony (Eupatorium cannabinum) flower, Belgium. August.

Nick Upton / Hemp agrimony (Eupatorium cannabinum) flowering on a woodland edge, Bath and Northeast Somerset, UK, September.

Nick Upton / Small white butterfly (Pieris rapae) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers in a woodland ride, Catcott Lows National Nature Reserve, Somerset, UK, September.

Nick Upton / Large tiger hoverfly / Sun fly (Helophilus trivittatus) nectaring on Hemp agrimony (Eupatorium cannabinum) flowers in a woodland ride, Catcott Lows National Nature Reserve, Somerset, UK, September.

Nick Upton / Common agrimony (Agrimonia eupatoria) flowers and flowerbuds in a chalk grassland meadow, Wiltshire, UK, June.

Linda Pitkin / Hemp-agrimony (Eupatorium cannabinum), Basingstoke Canal, Surrey, England, July.

Ernie Janes / Red admiral butterfly (Vanessa atalanta) in flight to Hemp-agrimony, Norfolk, England, UK, August.

Will Watson / Burs of Fragrant agrimony (Agrimonia eupatoria), Tiddesley Wood Nature Reserve, Worcestershire, England, September.