Lesser Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Paul L'Etoile | Ninigret | Charlestown | Washington | 25-Mar-2017 |
| Dianne Auld | Ninigret Pond | Charlestown | Washington | 15-Jan-2017 |
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 15-Jan-2017 |
| Dick & Marge Bradley | Ninigret | Charlestown | Washington | 13-Jan-2017 |
| Danielle Crudden | Ninigret | Charlestown | Washington | 01-Jan-2017 |
| Jan St.Jean | Ninigret Nwr | Charlestown | Washington | 01-Jan-2017 |
| Cathy Gim | Ninigret | Charlestown | Washington | 01-Jan-2017 |
| SusieQ | Ninigret | Charlestown | Washington | 01-Jan-2017 |
| Wayne Munns | Ninigret NWR | Charlestown | Washington | 01-Jan-2017 |
| Carlos Pedro | Ningret | Charlestown | Washington | 01-Jan-2017 |
| Matt Schenck | Ninigret NWR--Grassy Point Boat Launch | Charlestown | Washington | 01-Jan-2017 |
| Don Heitzmann | Ninigret NWR | Charlestown | Washington | 01-Jan-2017 |