|Eastern Tiger Swallowtail - Black Female Form - Papilio glaucus|
Family Papilionidae -- swallowtail butterflies
Live adult butterflies photographed at Alpharetta, Georgia
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The black female form of the Eastern Tiger Swallowtail supposedly mimics the Pipevine swallowtail, and is most often seen in areas where the pipevine is active.
Found in the Eastern United States, as far north as southern Vermont, and as far west as eastern Colorado. Flies from spring through fall, and most of the year in the southern portions of its range, where it may produce two or three broods a year. In the Appalachian region, it is replaced by the closely-related and only recently described larger-sized Papilio appalachiensis, and in the north, it is replaced by the closely-related Papilio canadensis. These three species can be very difficult to distinguish, and were formerly all considered to be a single species.
Adult males are yellow, with four black "tiger stripes" on each fore wing. The trailing edges of the fore and hind wings are black which is broken with yellow spots. On the medial margin of the hind wing next to the abdomen there are small red and blue spots.
Eastern tiger swallowtail is the state butterfly of Georgia, Virginia, Alabama, South Carolina and Delaware.
There are two morphs of adult females, a yellow and a dark one. The yellow morph is similar to the male, except that the hind wings have an area of blue between the black margin and the main yellow area. In the dark morph, most of the yellow areas are replaced with a dark gray to a black. A shadow of the "tiger stripes" can still be seen on the dark females.
Spherical green eggs are laid on the top of leaves of host plants. After hatching, the caterpillars often eat the shell of their egg. The first instars are dark and mimic bird droppings. The larvae eat the leaves of a wide variety of trees, including cottonwood, tulip tree, lemon and cherry.
Learn to identify many of the American Midwest's common species through descriptions and large diagnostic photos of live, wild specimens.
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