Sargasso Shearwater has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Carlos Pedro | Block Canyon Trip | Pelagic | Offshore | 15-Aug-2017 |
| Paul L'Etoile | Big Game Fishing Charter | Pelagic | Offshore | 14-Aug-2017 |
| Wayne Munns | Block Canyon Pelagic | Pelagic | Offshore | 14-Aug-2017 |