We have a number of different dark swallowtail butterfly species in our area and sometimes I have trouble telling them apart. Recently I have seen Black Swallowtails fairly frequently and occasionally I will see a Pipevine Swallowtail. I know that there is also a dark morph version of the Eastern Tiger Swallowtail and a Red-spotted Purple butterfly sometimes looks almost like a swallowtail.
Are you confused yet? When I spotted this cool-looking butterfly on Wednesday at Occoquan Bay National Wildlife Refuge, I was not sure what it was. Rather than endlessly speculating while in the field, I follow what I call the “Law of the Wild West”—shoot first and ask questions later—and wait to identify my subjects until after I have loaded my images onto my computer.
I have grown accustomed to using a blog posting by the Louisiana Naturalist to help identify dark swallowtails—it provides side-by-side photos of four different species. On the basis of that posting and some other research, I have concluded that “my” butterfly is probably a Spicebush Swallowtail (Papilio troilus) butterfly, a species that I don’t recall seeing the past few years.
The background of the photo is not particularly interesting, but I was patient enough to wait for the butterfly to open its wings, so you get a good look at the wonderful markings of this Spicebush Swallowtail butterfly.
© Michael Q. Powell. All rights reserved.
Mike Powell 
Spectacular 🤩