Amasa Valley, Delta, Utah Native to North America. It is one of the most familiar butterflies in the eastern United States
Males are yellow with four black "tiger stripes" on each fore wing. The outer edge of the fore wing is black with a row of yellow spots. The veins are marked with black. The postmedian area of the hind wing is black with yellow spots along the margin. The inner margin of the hind wing has small red and blue spots. The ventral fore wing margin has a yellow bar that is broken into spots. This broken bar is present in both sexes, and is used to distinguish P. glaucus from its close relatives.
Females are dimorphic. The yellow morph differs from the male in having a blue postmedian area on the dorsal hind wing. In the dark morph, the areas that are normally yellow are replaced with dark gray or black. The bluish postmedian area on the ventral hind wing his one row of orange spots. A shadow of the "tiger stripes" can be seen on the underside of some dark females
General information about
Eastern Tiger Swallowtail :
The caterpillars can be a gardening pest. Adults feed on the nectar of many species of flowers, mostly from those of the Apocynaceae, Asteraceae, and Fabaceae families. The chrysalis varies in color, ranging from off white to dark brown. It is often spotted with green and dark brown. Ligter-colored chrysalids often have a dark lateral stripe along each side of the body. Two horn-like projections are present on the head; one is found the thorax.