Photo 5864468, (c) Jim de Waal Malefyt, some rights reserved (CC BY-NC), uploaded by Jim de Waal Malefyt

Attribution © Jim de Waal Malefyt some rights reserved Uploaded by jimmalefyt Source iNaturalist Associated observations Photos / Sounds What Great Black-backed Gull (Larus marinus) Observer jimmalefyt Date December 21, 2016 02:36 PM EST Place Cohoes, NY, USA (Google, OSM) Date Added December 22, 2016 05:32 PM EST Description Adult 2 IDs Research Grade View Sizes small medium large original Copyright