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.