Didn't mean for it to happen but a few weeks ago, an Eastern Black Swallowtail came around laying eggs on my parsley. Lots of eggs. They turned into lots of cats...they attracted a frog so my husband and I went on a mission to save what we could. Ended up with three, then something got one so we have two left. One just turned last night. One getting ready. We made a temporary screened in area to preserve the two. This will be neat to watch.