Black Eastern Tiger Swallowtail

Taking photos of butterflies has always been fairly challenging for me, because they don't exactly sit still for you.

That's why I'm sharing all three photos of what I believe is the dark form of the Eastern Tiger Swallowtail (Papilio glaucus). It's sitting on verbena bonariensis.

This way I don't have to decide which of the three photos to leave out.

UPDATE: Many thanks to Jeff Pippen for identifying this as a Spicebush Swallowtail (Papilio troilus).