The cormorant flapped its wings on and off for four minutes or so, then relaxed them and started scanning the water more keenly. Another minute or so scanning, then off it dived again. This time it came up without a trophy.
Back on the perch again, then diving again after only a brief pause. Once again, surfacing without prey. It swam around, diving a couple more times with the same result. As we left, it was still swimming in the same area.