Using a long-exposure photography technique, Xavi Bou captured bird flight patterns in his series Ornitographies.

Unlike other motion analysis which preceded it, Ornitographies moves away from the scientific approach of chronophotography used by photographers like Eadweard Muybridge and Etienne-Jules Marey.

The approach used by Xavi Bou to portray the scene is not invasive; moreover, it rejects the distant study, resulting in organic form images that stimulate the imagination.