The Owlet Moths (Noctuidae) are mostly dull-coloured butterflies that are active at night. Most species have grey colours, but there are also species whose rear wings are brightly coloured. The front wings often have two owl marks, the eye marks and kidney marks. The wingspan is usually a maximum of 50 mm. The owls family is the largest family within the Dutch macro butterflies. The spotted owls belong to the subfamilies Acronictinae, Amphipyrinae, Bryophilinae, Cuculliinae, Eustrotiinae, Heliothinae, Metoponiinae, Noctuinae and the Plusiinae.