Description [edit]. Its wings feature an orange and black pattern, and over most of its range it is a Muellerian müllerian mimic with the monarch (Butterfly danaus). Plexippus the'viceroy s wingspan is between 53 and 81. mmhe viceroy has a lighter color pattern in Georgia in the United States, and it changes to a darker color pattern in the southern part of Florida as they switch from one model to another. The viceroy butterfly is a perfect mimic of its model the monarch (Danaus plexippus) that has chemical defenses.