Here we've got two American Oystercatchers in mid-flight, but the bird on right is closer to the camera and off the focal plane. This photo never sat right with me. I asked friends if it was bothersome and it was resoundingly agreed that the out of focus right bird created serious issues with this shot. It was expressed best by a photographer friend who perfectly explained why:The soft bird is closer, and lends to wanting to be the focal point, So it can lead your eye through the composition. The focus on the rear bird makes you look past the first bird, making the viewing more cumbersome. 