Bonaparte's Gull has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Barbara Sherman | Moonstone Beach | South Kingstown | Washington | 25-Nov-2017 |
| Danielle Crudden | Napatree | Westerly | Washington | 30-Jul-2017 |
| Paul L'Etoile | Ninigret Pond | Charlestown | Washington | 20-Jul-2017 |
| Carlos Pedro | 10-25 mi SE of Block Isl. | Pelagic | Offshore | 25-Mar-2017 |
| Wayne Munns | cod boat | New Shoreham | Washington | 25-Mar-2017 |
| Don Heitzmann | Beavertail State Park | Jamestown | Newport | 22-Feb-2017 |
| DAVID WALLIS | Ocean view | Narragansett | Washington | 03-Feb-2017 |
| Dick & Marge Bradley | Moonstone beach | South Kingstown | Washington | 02-Feb-2017 |
| Jan St.Jean | Trustom Pond | South Kingstown | Washington | 01-Jan-2017 |
| Cathy Gim | Trustom Pond NWR | South Kingstown | Washington | 01-Jan-2017 |
| Matt Schenck | Moonstone Beach | South Kingstown | Washington | 01-Jan-2017 |