On Butterflies and Caterpillars

We've recently discovered several brightly-striped caterpillars feeding on the carrots, fennel and parsley. At first, we assumed them to be Monarch butterfly (which are similarly striped), but this was questioned by an astute garden visitor (we're fortunate to have many).

 

Upon further investigation, we've identified the caterpillars as those of the Eastern Black Swallowtail (Papilio polyxenes) also called the American Swallowtail Butterfly. This butterfly's larvae feed on members of the carrot family: Dill, Fennel, Golden Alexanders, Parsley, Parsnips, Queen Anne's Lace and Carrots.