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.
Life Cycle (Back to Top) Habitats of the black swallowtail are generally open areas, including both uplands and wet areasâwet prairies, fields, flat-woods, pine savannas, roadsides, weedy areas, and gardens (Minno et al 2005). Males perch and patrol open areas for femalesâoften near patches of host plant (Glassberg et al 2000).