Lesser Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Wayne Munns | Offshore pelagic | Pelagic | Offshore | 16-Sep-2019 |
| Paul L'Etoile | Ninigret Pond | Charlestown | Washington | 21-Apr-2019 |
| James Restivo | Ninigret - Grassy Point Trail | Charlestown | Washington | 23-Mar-2019 |
| Alex Patterson | Ninigret NWR | Charlestown | Washington | 27-Jan-2019 |
| Dick & Marge Bradley | Ninigret | Charlestown | Washington | 25-Jan-2019 |
| Don Heitzmann | Niniget | Charlestown | Washington | 17-Jan-2019 |
| Matt Schenck | Ninigret NWR | Charlestown | Washington | 13-Jan-2019 |
| Dominick Pacelli | Ninigret | Charlestown | Washington | 12-Jan-2019 |
| Sue Palmer | Weekapaug/Misquamicut | Westerly | Washington | 11-Jan-2019 |
| Jan St.Jean | Ninigret | Charlestown | Washington | 10-Jan-2019 |
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 08-Jan-2019 |
| Carlos Pedro | Nnigret | South Kingstown | Washington | 08-Jan-2019 |
| John Magill | Ninigret Grassy Pt. | Charlestown | Washington | 07-Jan-2019 |