“The Eastern Tiger Swallowtail (Papilio glaucus) is a species of swallowtail butterfly native to North America. It is one of the most familiar butterflies in the eastern United States.
The Eastern Tiger Swallowtail was once considered to be a single species, but is now divided into three species; the Canadian Tiger Swallowtail (Papilio canadensis), the Eastern Tiger Swallowtail, and the Appalachian Tiger Swallowtail (Papilio appalachiensis). These three species are very similar to one another, and can be hard to tell apart. The Eastern Tiger Swallowtail has a wingspan of 7.9 to 14 centimeters (3 to 5.5 inches). The adult male is yellow, with black “tiger stripes”. There are two morphs of adult females, a yellow one and a dark one. The yellow one is similar to the male, except there is a patch of blue on the hind wing. In the dark morph, the yellow areas are replaced by dark gray or black" Wikipedia
May in Wings in the Wind Calendar