Gin that is sooooooo beautiful!! I am an x butterfly collector and this was and still is one of my favorites. You probably know this, but it's a Tiger Swallowtail, which form I can't say. I've been doing some Google searches, but can't ID the particular variety. I will continue to check.
Here in MN, I never see these (almost never) until late summer and then very seldom. Thanks so much for posting.