Taken with the Panasonic Lumix GH4 in 4K video mode and a grab from one frame. 1/4000th second f4.8, 100-400 lens. The bird was coming from an upright post to the peanut feeder, a flight of about 5 feet and I prefocused in the gap. I leave the camera running on a loop and only have to press the shutter button when I think the bird has flown close to where I have focused. This stops the loop and saves the file.