Saturday, July 31, 2010

Marsh Ecosystem-Black Swallowtail


Black Swallowtail

Order: Lepidoptera

Family: Papilionidae

Genus: Papiilo

Species: P. polyxenes

General Characteristics: The black swallowtail is a black butterfly with yellow markings near the margins of the forewings and hindwings and more limited blue and red markings on the hindwings. Its wing span can reach 4 ½ inches. Full grown parselyworms or caterpillars can reach 2 inches in length and are smooth and green, marked with black bands and yellow spots. Caterpillars have chewing mouthparts. Adults have siphoning mouths. Host plants of the caterpillar include members of the parsley family (Umbelliferae) including carrot, parsley, dill, fennel and Queen Anne's lace and some members of the Rutaceae (Ruta graveolens and Thamnosma texana).

Special Adaptations: The black swallowtail mimics the bad tasting pipevine swallowtail, Battus philenor (Linnaeus), which are all metallic black-blue on the upper surface of the wings, lacking the yellow and blue markings. Caterpillars feed on pipevines, Dutchman’s-pipe and Virginia snakeroot.

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