I don't think I've seen these other then at the Bronx Zoo Butterfly Exhibit ( BZBE for future references ). I might've seen one at camp a million years ago with what I thought for certain was a Spicebush Swallowtail ( Papilio troilus ) but now I know better.
That butterfly was a Pipevine Swallowtail ( Battus philenor ). However since I'm feeling kind of weird right now I'm going to wrap this one up. Sorry no rant today. ^.^ Next time.
Bugguide and Wikipedia once again provide info:
The common names for the caterpillars vary because they can be found on many important cultivated plants in the Carrot Family. Pick the host plant, add the word "worm", and you have another common name that has probably been used and published somewhere.
Larvae feed primarily on plants of the carrot family (Apiaceae = Umbelliferae), and some in the Rue Family (Rutaceae). Commonly found on Dill, Parsley, Fennel, Carrot, and Rue in gardens, and Queen-Anne's-Lace, Poison Hemlock, and Lovage in the wild. They will occasionally be found on Citrus trees. Adults take nectar and frequently visit moist ground.
Quoted in part from Bugguide here. It has very nice pics to go with it and to help with ID, whihc I think is wonderful because so many other Swallowtails resemble these and vice-versa.
Next is a bit from Wikipedia. Some stuff might be the same. I advise reaserch after to confirm what is posted below please. Thank you!
The reason being Wikipedia is sometimes incorrect on certain things.
The (Eastern) Black Swallowtail (Papilio polyxenes) also called the American Swallowtail or Parsnip Swallowtail, is a butterfly found throughout much of North America. It is the state butterfly of Oklahoma. There is an extremely similar-appearing species, Papilio joanae that occurs in the Ozark Mountains region, but it appears to be closely related to Papilio machaon, rather than polyxenes.
The Black Swallowtail has a wingspan of 8 to 11 cm (3.1 to 4.3 in). The upper surface of the wings is mostly black. On the inner edge of hindwing is a black spot centered in larger orange spot. A male of this species has a yellow band near edge of wings; a female has row of yellow spots. The hindwing of the female has an iridescent blue band.
Rest of the info is here. Once again I advise you to do extra research. Thank you
Until next time!!