Tree Swallow has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Wayne Munns | EPA lab | Narragansett | Washington | 23-Apr-2019 |
| James Restivo | Great Swamp | South Kingstown | Washington | 06-Apr-2019 |
| Sue Palmer | Great Swamp | South Kingstown | Washington | 30-Mar-2019 |
| Alex Patterson | Great Swamp | South Kingstown | Washington | 29-Mar-2019 |
| Paul L'Etoile | Great Swamp | South Kingstown | Washington | 23-Mar-2019 |
| John Magill | Great Swamp | South Kingstown | Washington | 21-Mar-2019 |
| Jan St.Jean | Great Swamp | South Kingstown | Washington | 20-Mar-2019 |
| Don Heitzmann | Great Swamp | South Kingstown | Washington | 20-Mar-2019 |
| Matt Schenck | Great Swamp Management Area | South Kingstown | Washington | 18-Mar-2019 |
| Carlos Pedro | Wyoming Pond | Hopkinton | Washington | 16-Mar-2019 |
| Barbara Sherman | Wyoming Pond | Hopkinton | Washington | 16-Mar-2019 |
| Dick & Marge Bradley | Great swamp | South Kingstown | Washington | 16-Mar-2019 |
| Dianne Auld | Trustom | South Kingstown | Washington | 16-Mar-2019 |
| Dominick Pacelli | Great Swamp | South Kingstown | Washington | 15-Mar-2019 |