Eurytides marcellus
The Zebra Swallowtail (Eurytides marcellus) is a North American butterfly.  It is in the family Papilionidae.  Some authors place the species under the genera Iphiclides, Graphium, and Papilio.  Its obvious black and white-striped pattern is like the pattern of a zebra.  The Zebra Swallowtail is the official state butterfly of Tennessee.