Description Putting ring on a seagull and giving it a radio beaconMPG file - 565.79 MB - 1 920 x 1 080 pixelsadded on 2013-06-141 439 viewsPerson on image Stienen, EricPerson on image Matheve, Hans This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License