Simple but rather time consuming. I chose the image with the most sky and least bird, cut out the bird and cloned in the remaining white area and duplicated it 12 times, then cloned a decent blend so overall it looked fairly realistic. Next, using the quick select tool and the refine edge tool I selected each of the movements and loosely placed them on the new sky until I was satisfied with the placement in regards to how he looked as I shot the sequence. When placing each bird in the sequence, I defringed each by 2 pixels to omit any hard edges. I started way big at 112 inches wide by 12 inches high then dropped it to 240 dpi and 66 inches. The total flyover lasted no more than 6 seconds. There was a total of 17 shots made but several were duplicate wing positions so I didn't use them.