Blue Pipevine Swallowtail Butterfly

The Pipevine Swallowtail is seen from April to October in the northern portion of its range and from February to November in the southern portion. There are two broods in the north and three or more in the south.
Life cycle
Males patrol for females in suitable habitats. Females will lay clusters of one to twenty reddish-brown eggs on the underside of host plant leaves. Young caterpillars are gregarious, while older larvae are solitary. The caterpillars will eat the leaves, stems, and seed capsules of the host plant. The larvae are either black or smoky red. Many fleshy filaments project from the sides of the body, the longest being on the anterior end. Over the dorsal part of the body are two rows of orange-red warts. The chrysalis is brown or green, with two horns on the head, a point on the thorax, and a ridge on each side of the abdomen. The abdomen is often patched with yellow. The chrysalis hibernates in areas with cold winters.