About Thyraylia nana (Haworth, 1811)
Thyraylia nana (synonym Cochylis nana) is a moth species in the family Tortricidae. It was first described by Adrian Hardy Haworth in 1811. This species is found in Europe, Amur Oblast of Russia, and Nova Scotia, Canada. The moth has a wingspan of 9–12 millimetres (0.35–0.47 in). Its head is white. The costa of its forewing is gently arched. The forewing's ground colour is white. The basal area and costa of the forewing are marked with fine blackish streaks, known as strigulation. There is a broad, straight median fascia covered with blackish speckling (irroration) and fine streaks; this fascia becomes wider towards the dorsal edge, and its posterior edge is wavy. The apical area of the forewing is clouded with pale ochreous, and has a suffused speckled blackish spot on the costa just before the apex, which is sometimes indistinctly connected to the tornus. The forewing cilia are pale ochreous, with faint indistinct bars of blackish speckling. The hindwings of this moth are pale grey. A full description of this species is provided by Julius von Kennel. Adult moths fly from mid-April to mid-June. The larvae feed on species of birch.
