About Semioscopis avellanella (Hübner, 1793)
Semioscopis avellanella, scientifically named Semioscopis avellanella (Hübner, 1793), is a moth species belonging to the family Depressariidae. It occurs across most of Europe, excluding most of the Balkan Peninsula and the Iberian Peninsula, and ranges eastward into the eastern regions of the Palearctic realm. This moth has a wingspan of 20 to 26 millimeters. Its forewings are rosy greyish-white, sprinkled with pale fuscous markings. A dark fuscous streak runs from the base along the forewing fold to one-third of the wing length, then bends upward to the disc before the middle of the wing. The second discal stigma forms an angulated dark fuscous mark. Dark fuscous scales are arranged to form small dots along the costa and termen of the forewing, and veins 2 and 3 are separate from one another. The hindwings are pale greyish in color. Fully grown larvae are whitish-green, with a darker dorsal line, and green heads and green second thoracic plates. Adult moths are active on the wing from March to April. The larvae feed on species of the genera Betula, Tilia (including Tilia cordata), and Carpinus.
