Caloptilia leucapennella is a moth of the family Gracillariidae. It is known from all of Europe, except the Balkan Peninsula. The wingspan is about 13 mm.The posterior tibiae is smooth above. Forewings are pale whitish yellow, with some scattered minute black dots, variable in development ; sometimes spots of grey strigulae, especially in disc;sometimes a ferruginous black -spotted median longitudinal streak from base of costa to apex. Hindwings are dark grey. The typical form of the adult is a pale yellowish white, but there are variations, ranging to the rufous form F. aurantiella. Adults are on wing from July to October and overwinter.