Andy Sands / Hoverfly (Chrysotoxum bicinctum) distinctive black and yellow hoverfly visiting Wild Parsnip flower, Buckinghamshire, England, UK, July

Andy Sands / Hoverfly (Chrysotoxum bicinctum) distinctive black and yellow hoverfly visiting Wild Parsnip flower, Buckinghamshire, England, UK, July

Christophe Courteau / Parsnips (Pastinaca sativa)

Andy Sands / Tachnid fly (Phasia hemiptera) male feeding on flower of wild parsnip (pastinaca sativa), Oxfordshire, England, UK, August

Andy Sands / Hoverfly (Chrysogaster solstitalis) this hoverfly has extremely large eyes that are characteristic of the species, pictured on wild parsnip, Buckinghamshire, England, UK, July

Andy Sands / Sawfly (Tenthredo amoena) feeding on Red Soldier beetle (Rhagonycha fulva) on flower of wild parsnip (Pastinaca sativa), Oxfordshire, England, UK, July

Andy Sands / Tachnid fly (Phasia hemiptera) male feeding on flower of wild parsnip (Pastinaca sativa), Oxfordshire, England, UK, August

David Pike / Wild parsnip (Pastinaca sativa) in flower, Green Down Nature Reserve, Somerset, England, UK, July.

Ernie Janes / Giant Hogweed (Heraculum mantegazziamum) growing near the sea, with woman walking dog in distance, Norfolk, England, July 2013.

Nigel Cattlin / Umbels of flowers of poisonous Giant hogweed (Heracleum mantegazzianum) plant against blue sky, Devon, England, UK, June.

Colin Varndell / Giant hogweed (Heracleum mantegazzianum) in bloom, Dorset, UK, June.

Nigel Cattlin / Umbels of flowers of poisonous and notifiable plant giant hogweed (Heracleum mantegazzianum) against blue sky, Devon, England, UK, June.