This epub is a short blurb explaining how to create images of birds in flight through space and time. The National Geographic Society published an article in their January, 2018 issue, beginning on page 58, written by Catherine Zuckerman with photographs by Xavi Bou, showing the flight paths of birds. The images were created by stacking multiple photographs, taken at closely spaced time intervals, in a single image. The images show the track of the bird in four-dimensional space-time. I find the resulting images fascinating. I hope you do too.