Photo 5897852, (c) roby, some rights reserved (CC BY-NC), uploaded by roby

Attribution © roby some rights reserved Uploaded by roby Source iNaturalist Associated observations Photos / Sounds What Black-headed Gull (Chroicocephalus ridibundus) Observer roby Date December 28, 2016 12:28 PM CET Place Locarno, Svizzera (Google, OSM) Date Added December 28, 2016 06:39 PM CET 2 IDs Research Grade View Sizes small medium large original