This is an Eastern Black Swallowtail.
It uses a variety of plants as hosts for its caterpillars, even poison hemlock.
Interestingly, hemlock is what the ancient Greeks used to execute prisoners.
Think about it.
A tiny caterpillar can munch on a poisonous plant like candy while we would drop down dead if we tried the same thing.
This gives a new meaning to the expression, “Name your poison.”
See imagesbyvandyne on etsy.com for more photos.