About Acleris emargana (Fabricius, 1775)
Acleris emargana (Fabricius, 1775) has a wingspan of 18–22 mm. Individual appearance varies within the species. In general, its forewings are greyish brown or yellow ochreous, lightly translucent, usually more or less notched and hooked on the costa, with a reticulated (net-like) pattern. The hindwings are greyish and translucent. Julius von Kennel provides a full description of this species. Acleris emargana is very similar to, and has often been confused with, Acleris effractana. Adult moths are on wing from July to November and fly at dusk. Fully grown larvae reach a length of approximately 15 mm. They are pale green with a pale brown head. The caterpillars feed on the leaves and shoots of various trees, including Alnus glutinosa, Corylus, Salix, Populus and Betula. The nominotypical subspecies Acleris emargana emargana is distributed from Europe to Siberia, northern China, Korea and Japan. The subspecies Acleris emargana tibetica is found in Tibet.
