Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Orba Underwing (Catocala orba) is a moth of the Noctuidae family. It is found from Massachusetts south to Georgia and Florida, west to Texas, and as far north as Mississippi.The wingspan is 40-45 mm. Adults are on wing from June to August. There is probably one generation per year.The larvae probably feed on hickory and walnut. A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth (about ten times the number of species of butterfly), with thousands of species yet to be described.