I sat and watched for the Ornythion for a while this morning. Thought I might have glimpsed it, but while I was watching I got photos of a Black Swallowtail and a Two-tailed Swallowtail. The latter I had only seen here once before, years ago, before I had a digital camera. So I was thrilled to get a decent photo of it.
As you can see, I struggled with the manual camera setting on these.
The Two-tailed didn't hang around long. It got mobbed and harrassed by Pipevine Swallowtails.