That can't be the one that laid the eggs - it's a male spicebush swallowtail, and they use spicebush, sassafras, and other members of the laurel family. Black swallowtails look very much like spicebush swallowtails, though, so maybe this one just looked like the one that laid the eggs.
MissSherry

Thank you, misssherry, for clearing that up for me. You are so knowledgeable - I just love these forums, everyone is so helpful - AND QUICK with responses.
Suz