Photo 32763476, (c) Ken Rosenthal, some rights reserved (CC BY-NC), uploaded by Ken Rosenthal

Attribution © Ken Rosenthal some rights reserved Uploaded by krosenthal Source iNaturalist Associated observations Photos / Sounds What Ring-billed Gull (Larus delawarensis) Observer krosenthal Date March 12, 2019 06:49 AM EDT Place Southwest Philadelphia, Philadelphia, PA, USA (Google, OSM) Date Added March 13, 2019 12:29 AM EDT 2 IDs Research Grade View Sizes small medium large original