Photo 10706221, (c) Carl-Adam Wegenschimmel, some rights reserved (CC BY-NC), uploaded by Carl-Adam Wegenschimmel

Attribution © Carl-Adam Wegenschimmel some rights reserved Uploaded by carl-adam Source iNaturalist Canada Associated observations Photos / Sounds What Black-headed Gull (Chroicocephalus ridibundus) Observer carl-adam Date September 11, 2013 12:21 PM EDT Place Zürich, Switzerland (Google, OSM) Date Added September 24, 2017 04:52 PM EDT Tags Europe 2 IDs Research Grade View Sizes small medium large original