Oncocera semirubella
Oncocera semirubella is a small moth of the family Pyralidae. It is found in European regions, including the British Isles, and East Asia (e.g. China, Japan, South Korea and Taiwan). The wingspan is 26–30 mm. The adult moth flies in one generation from the end of June to August. It is easily disturbed from short grassland, flies from dusk onwards, and is attracted to light and sugar. The larvae feed on bird's-foot trefoil ("Lotus corniculatus"), white clover, "Ononis" species, horseshoe vetch and "Medicago" species.