Lesser Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Kellen Rosburg | Block Island (and ferry) | Charlestown | Washington | 28-Sep-2013 |
| Deb Peterson | Swan Point | Providence | Providence | 18-Aug-2013 |
| Janaehesser | Newport Bridge | Newport | Newport | 12-Aug-2013 |
| Phil Budlong | Point Judith | Narragansett | Washington | 12-Feb-2013 |
| Cathy Gim | Southeast of Block Island | Pelagic | Offshore | 29-Jan-2013 |
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 21-Jan-2013 |
| Carlos Pedro | Ninigret | Charlestown | Washington | 19-Jan-2013 |
| Paul L'Etoile | Point Judith | Narragansett | Washington | 18-Jan-2013 |
| Wayne Munns | Ninnigret Park | South Kingstown | Washington | 09-Jan-2013 |
| John Magill | Ninigret NWR | Charlestown | Washington | 06-Jan-2013 |
| drew wheelan | camp cronin | Narragansett | Washington | 02-Jan-2013 |
| Jan St.Jean | Point Judith | Narragansett | Washington | 01-Jan-2013 |