Harlequin Duck has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Dick & Marge Bradley | Brenton Point | Newport | Newport | 11-Jan-2024 |
| Sue Palmer | Third Beach | Middletown | Newport | 08-Jan-2024 |
| Dominick Pacelli | Cliff Walk | Newport | Newport | 06-Jan-2024 |
| Charles Avenengo | Cliff Walk | Newport | Newport | 06-Jan-2024 |
| Jess Bishop | Brenton Pt | Newport | Newport | 02-Jan-2024 |
| Paul L'Etoile | Pt Judith | Narragansett | Washington | 01-Jan-2024 |