Photo 11761179, (c) Bob Hislop, some rights reserved (CC BY-NC), uploaded by Bob Hislop

Attribution © Bob Hislop some rights reserved Uploaded by rhislop Source NaturaLista Colombia Associated observations Photos / Sounds What Ring-billed Gull (Larus delawarensis) Observer rhislop Date November 10, 2017 09:13 AM PST Place Heather Farm Park, Walnut Creek, CA, USA (Google, OSM) Date Added November 10, 2017 10:26 PM PST 4 IDs Research Grade View Sizes small medium large original