About Phyllonorycter roboris (Zeller, 1839)
Phyllonorycter roboris (Zeller, 1839) is a moth species belonging to the family Gracillariidae. This species can be found across all of Europe. It has a wingspan measuring 7–9 mm. Its forewings are a shining white color. A very oblique, golden-brown fascia starts from the base of the costa; this marking is broader toward the upper edge, and has a fuscous border along its posterior side. There are four dark fuscous costal strigulae approaching the apex, each edged with an ochreous tint on the anterior side. The first of these strigulae is oblique and almost reaches a similar dorsal strigula. A golden-brown apical spot, which contains a small black dot, is present, and a dark apical hook can be seen in the forewing cilia. The hindwings of this moth are plain grey. Adult moths fly in June, and there is only one generation per year. The larvae of this species feed on the leaves of multiple oak species: Quercus cerris, Quercus dalechampii, Quercus faginea, Quercus frainetto, Quercus macrocarpa, Quercus pedunculiflora, Quercus petraea, Quercus polycarpa, Quercus pubescens and Quercus robur. Larvae create leaf mines within the leaves of their host plants.
