AppearanceThe wingspan is 15–25 mm. Adults have gray to grayish-brown forewings with a pale diffuse line bordered distally by dark band. There is also a black median dot and two black reniform dots, which form a triangle. The terminal line is composed of dark dots. The hindwings are shiny gray with dark veins and a fringe of long hair-like scales. They are on wing from April to September.
NamingIt is commonly known as the acorn moth, but this can also refer to the tortrix moth ''Cydia splendana'' from Europe.
FoodThe larvae feed inside acorns and chestnuts.
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