Northern rough-winged swallows at Chatfield Park. They fly really quickly so hard to get good flight shots. This is an image taken from a 4K video, using 4K photo mode on my Lumix GX8 at 1/1600s. A shutter speed of 1/1600s will totally freeze most fast action, so the fact that the wing tips are blurry shows how fast they move! I like the composition here, the simple blurred background (which is a river), and the fact that the perching bird is looking towards the flying one.