Priority Mail Dimensional Weight Calculation. 1Round off (e.g., 20.5 rounded off to the next whole number is 21, and 20.4 rounded off is 20), 2Round up (e.g., rounding up either 44.2 or 44.8 to the next whole pound is 45).
The Black Swallowtail (Papilio polyxenes) is a species of butterfly. It is also called the American Swallowtail or Parsnip Swallowtail. It is found throughout much of North America.
Adult swallowtails fly in open areas (fields, vacant lots, meadows, open forest, sides of streams) near their food plants, especially where there are abundant flowers. Caterpillars are found on their food plants. These animals are found in the following types of habitat.