Lithophane ornitopus Hufnagel, 1766
Common names: Grey Shoulder-knot [En], Xyline du chêne [Fr], Lichtgrijze uil [Nl], Hellgraue Holzeule [De]
Tubize, BRABANT ● Belgium
Description: The wingspan is 32–38 mm. The forewing is grey-white with a bifurcate black streak from base below cell, lines indistinct, pale with dotted edges, stigmata grey with partial black outlines and paler rings, the lower lobe of the reniform orange tinged, claviform sometimes connected by a black streak with outer line, and often a dark spot between the stigmata, submarginal line waved, white, preceded by dark marks. The hindwing is grey.
The whiter forms are separated as ab. pallida Spul.
Biology: The adults emerge in September and October, and overwinter, appearing again from February to April.
The caterpillars, like several other Lithophane species, have a tendency towards cannibalism. The foodplant is oak (Quercus).
Distribution: Most of the Palearctic ecozone from Ireland east to Siberia. In Belgium, the species is rare.
Wikipedia, Lithophane ornitopus
Lepidoptera of Belgium