Photo 17109384, (c) dgarvs, some rights reserved (CC BY-NC), uploaded by dgarvs

Attribution © dgarvs some rights reserved Uploaded by dgarvs Source iNaturalist Associated observations Photos / Sounds What Great Black-backed Gull (Larus marinus) Observer dgarvs Date April 27, 2018 10:10 AM EDT Place Boston, MA, USA (Google, OSM) Date Added April 30, 2018 09:44 PM EDT 2 IDs Research Grade View Sizes small medium large original