Lesser Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Alex Patterson | Ninigret NWR | Charlestown | Washington | 01-Mar-2020 |
| John Magill | Ninigret NWR | Charlestown | Washington | 27-Jan-2020 |
| Dominick Pacelli | Ninigret | Charlestown | Washington | 16-Jan-2020 |
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 11-Jan-2020 |
| Dick & Marge Bradley | Ninigret | Charlestown | Washington | 01-Jan-2020 |
| Carlos Pedro | Ninigret | Charlestown | Washington | 01-Jan-2020 |
| Wayne Munns | Ninigrit NWR | Charlestown | Washington | 01-Jan-2020 |
| Jan St.Jean | Ninigret | Charlestown | Washington | 01-Jan-2020 |
| Sue Palmer | Ninigret NWR | Charlestown | Washington | 01-Jan-2020 |
| Don Heitzmann | Ninigret NWR | Westerly | Washington | 01-Jan-2020 |
| Greg Nemes | Ninigret NWR -- Grassy Point | Charlestown | Washington | 01-Jan-2020 |
| Jess Bishop | Ninigret NWR | Charlestown | Washington | 01-Jan-2020 |
| Matt Schenck | Ninigret NWR--Grassy Point | Charlestown | Washington | 01-Jan-2020 |