Sargasso Shearwater has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Carlos Pedro | Block Canyon | Pelagic | Offshore | 03-Sep-2013 |
| Wayne Munns | Offshore pelagic aboard Big Game Sportfishing | Pelagic | Offshore | 03-Sep-2013 |
| John Magill | Block Canyon Trip | Pelagic | Offshore | 03-Sep-2013 |
| Jan St.Jean | Off shore pelagic | Pelagic | Offshore | 03-Sep-2013 |
| Paul L'Etoile | Trip to Block Canyon | Pelagic | Offshore | 03-Sep-2013 |