The Yellow Horned (Achlya flavicornis) is a moth of the family Drepanidae. It is found from Europe to the eastern Palearctic ecozone. The wingspan is 35–40 mm. The length of the forewings is 17–20 mm. The ground colour is greenish grey, sometimes speckled or dusted with darker grey.The reniform and orbicular marks are generally clear and distinct, but in some examples they are united and form a whitish blotch outlined in blackish; the cross lines are usually well defined, but in the dark grey dusted form are very obscure. The moth flies from February to April depending on the location.