Great Black-backed Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Barbara Sherman | Ninigret NWR | Charlestown | Washington | 09-Jan-2021 |
| David Gregg | Point Judith | Narragansett | Washington | 08-Jan-2021 |
| Jen Leitao | Scarborough beach south | Narragansett | Washington | 07-Jan-2021 |
| John Bean | Deep Hole | South Kingstown | Washington | 06-Jan-2021 |
| John Magill | Ninigret Grassy Pt | Charlestown | Washington | 05-Jan-2021 |
| Wayne Munns | Narra Bay Winter Waterfowl Survey (Jamestown) | Jamestown | Newport | 05-Jan-2021 |
| Dan Echt | Spooky bottom dock | East Providence | Providence | 05-Jan-2021 |
| Carlos Pedro | Misquamicut | Westerly | Washington | 02-Jan-2021 |
| Dick & Marge Bradley | Colt state park | Bristol | Bristol | 01-Jan-2021 |
| Jess Bishop | Atlantic Ave | Westerly | Washington | 01-Jan-2021 |
| Jan St.Jean | Atlantic Ave | Westerly | Washington | 01-Jan-2021 |
| Sue Palmer | Winnapaug Pond | Westerly | Washington | 01-Jan-2021 |
| Paul L'Etoile | Jamestown | Newport | 01-Jan-2021 | |
| Don Heitzmann | Weekapaug Breachway | Westerly | Washington | 01-Jan-2021 |
| Dianne Auld | Beavertail | Jamestown | Newport | 01-Jan-2021 |