Seaside Sparrow has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Dick & Marge Bradley | Ninigret mudflats | Charlestown | Washington | 11-Jul-2023 |
| Jess Bishop | Breachway | Charlestown | Washington | 04-Jul-2023 |
| Sue Palmer | Ninigret Mudflats | Charlestown | Washington | 17-Jun-2023 |
| Paul L'Etoile | Ninigret Pond | Charlestown | Washington | 30-Apr-2023 |