One of the swallowtails but I’m not sure which one. This is one of the reasons I like the K-1 II camera with the 28-105mm lens. It is too big to fit in one of my camera drawers so I leave it out on my computer table with the lens always on it so that it is easy to grab and run. I saw the butterfly go past the window and I grabbed the camera and ran out to the butterfly bush to get this image. But, I could just as well grabbed the Fuji X-T2 with the 18-135mm lens. I’m still dithering about why I need both camera systems.