I recently was reviewing images I took while on a trip to Craig Colorado in 2013. In one of the photos taken to the south of Craig in an unpopulated area, an object that appears to be a rapidly moving object appears. The object was not seen by me or heard by me when the photo was taken. It appears to be moving from the southeast toward the northwest in the sky. Image submitted. The object appears in the image as a black smudge to the right of the trees in the center of the image. I don't think this was a bird because of the amount of motion (blur). The camera is a Canon EOS 7D, shot at iso 100, f6.3, 1/100. Also the shape of the object would indicate it was relatively large (larger than a bird).