I'm having trouble identifying this one. I said it's a Black Swallowtail (the Oklahoma State Butterfly). A friend insists it's a SpiceBush Swallowtail. Because it was moving pretty fast, I didn't get a definitive shot of the open wing and the underwing seems to not quite be anything I have found. After more research, I don't know what it is. If anyone knows what it is, please help.