Lesser Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Paul L'Etoile | Ninigret Pond | Charlestown | Washington | 01-Sep-2018 |
| Kari McDonald | Ninagrit | Charlestown | Washington | 18-Mar-2018 |
| DAVID WALLIS | Ninigret | Westerly | Washington | 01-Mar-2018 |
| Dominick Pacelli | Ninigret | Charlestown | Washington | 09-Feb-2018 |
| Dianne Auld | Ninigret | Charlestown | Washington | 20-Jan-2018 |
| Danielle Crudden | Ninigret | Charlestown | Washington | 16-Jan-2018 |
| Wayne Munns | Grassy Pt, Ninigrit | Charlestown | Washington | 16-Jan-2018 |
| Dick & Marge Bradley | Ninigret | Charlestown | Washington | 14-Jan-2018 |
| Matt Schenck | Scituate Reservoir (route 12) | Scituate | Providence | 05-Jan-2018 |
| John Magill | Ninigret NWR | Charlestown | Washington | 02-Jan-2018 |
| Don Heitzmann | Ninigret NWR | Charlestown | Washington | 02-Jan-2018 |
| Jan St.Jean | Ninigret | Charlestown | Washington | 02-Jan-2018 |
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 01-Jan-2018 |
| Carlos Pedro | Ninigret | Charlestown | Washington | 01-Jan-2018 |