Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Walnut Sphinx (Amorpha juglandis) is a moth of the Sphingidae family. It lives from the Atlantic Ocean to the Rocky Mountains and from the southern United States up into parts of Canada. The wingspan is 45-75 mm. Adult moths are nocturnal, being found rarely outside the early hours of the night. The caterpillars feed on Alder (Alnus), Hickory (Carya), Hazelnut (Corylus), Beech (Fagus), Walnut (Juglans) and Hop-hornbeam (Ostrya) species.