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.
Black Swallowtail Life Cycle: The Eggs Are Laid. The female will lay up from 200-430 pale yellow eggs, at a rate of about 30-50 per day. The eggs will turn a dark gray just before hatching, which takes about 10-13 days. Their life span is usually about 10-12 days, but some can live up to 30 days or more. Female Black Swallowtail butterfly laying eggs on dill.