Actebia praecox, the Portland moth, is a moth of the Noctuidae family. It is found in Northern and Central Europe, the Caucasus, Central Asia, Siberia, Kamchatka, Sakhalin, the Kuriles, Northern Turkey, Mongolia, China, Korea and Japan.
The wingspan is 35–40 mm. "Forewing narrow and elongate, dull pale green, dusted with whitish; the three stigmata ochreous concisely black-edged; orbicular round, with a rounded rufous centre, reniform with a fine angled line swollen at each end; submarginal line preceded by a dull vinous band; apex whitish; hindwing fuscous brown. — ab. flavomaculata Graes., bluish green with the ochreous tints more yellow and the hindwings much darke-r, is confined to the Asiatic localities, but Leech states that some Irish specimens resemble it." .
The larvae feed on Salix repens and other sand-dune plants.