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The Eastern tiger swallowtail (''Papilio glaucus'') is a species of swallowtail butterfly native to eastern North America. It is one of the most familiar butterflies in the eastern United States, where it is common in many different habitats. It flies from spring to fall, during which it produces two to three broods. Adults feed on the nectar of many species of flowers, mostly from those of the Apocynaceae, Asteraceae, and Fabaceae families. ''P. glaucus'' has a wingspan measuring . The male is yellow with four black "tiger stripes" on each fore wing. Females may be either yellow or black, making them dimorphic. The yellow morph is similar to the male, but with a conspicuous band of blue spots along the hindwing, while the dark morph is almost completely black. The green eggs are laid singly on plants of the Magnoliaceae and Rosaceae families. Young caterpillars are brown and white; older ones are green with two black, yellow, and blue eyespots on the thorax. The caterpillar will turn brown prior to pupating. It will reach a length of . The chrysalis varies from a whitish color to dark brown. Hibernation occurs in this stage in locations with cold winter months. ==Description== The wingspan ranges from 〔 with females being the larger sex. Southern individuals are larger than northern ones. 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 has one row of orange spots.〔 A shadow of the "tiger stripes" can be seen on the underside of some dark females.〔 ''P. glaucus'' is one of a few species of papilionids known to produce gynandromorphs. Most bilateral gynandromorphs are hybrids of ''P. glaucus'' and ''P. canadensis'' that are found along hybrid zones. Color mosaics are found in the central part of the species range. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Papilio glaucus」の詳細全文を読む スポンサード リンク
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