Photo © J.L. Cernadas
Pyropteron chrysidiforme, the fiery clearwing, is a moth of the family Sesiidae. It is found in Europe, more specifically in Spain, Portugal, Majorca, southern England, Belgium, France, Corsica, Sardinia, Italy and southern Germany.
The wingspan is 15–23 mm. The moth flies from June to July depending on the location.
The larvae feed on Rumex species.
Source: Wikipedia
The primary larval foodplants are Common Sorrel (Rumex acetosa), Curled Dock (Rumex crispus), Sheep's Sorrel (Rumex acetosella) and Water Dock (Rumex hydrolapathum).