This is a medium size fast bird that flys erratically and I have failed many times to photograph one. They are often difficult even when you find one sitting cause they abruptly dive from their perch and flit here and there. I have a few sitting shots but never one in flight. I was shooting birds in a pond when I saw from the corner of my eye a bird racing low across the sky, I just turned and shot three shots, didn’t even know what bird it was at first. When I got to view them all three were in focus. The AF system with the bird detect - which I had engaged as I was shooting ducks on the small pond, worked wonderfully. I am very pleased with the performance of the Fuji X-T5 so far. And they are promising a firmware update to improve the Auto Focus system. I have including a couple more birds that took off from the pond when I got too close for their comfort. Didn’t mean to but they were down in the reeds where I could not see them. Again the system worked well.