The green marvel (Acronicta fallax) is a moth of the Noctuidae family. It is found in most of North America, from Ontario, Quebec, New Brunswick, Nova Scotia, Newfoundland and Labrador and Manitoba south to Arizona and Florida. The wingspan is about 34 mm. Adults are on wing from February to November in Florida. The larvae feed on Viburnum species. They feed on the leaf underside. Full-grown larvae are bright lime to yellowish green with a whitish middorsal and somewhat broader subdorsal stripe.