Nice butterfly!
We don't have that many kinds up here but the swallow tails are out and this one I noticed while installing upstairs window screens the other day. Do you know what it is? It is liking the Portuguese laurel flowers. Next to it are American Pillar rosebuds just starting to open up, one I grew from a cutting. It is a rose that likes to grow up and through stuff and is doing so with the laurel.