Black Guillemot has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| John Magill | Off Clay Head | New Shoreham | Washington | 12-Mar-2020 |
| Dominick Pacelli | Block Island (and ferry near shore) | New Shoreham | Washington | 12-Mar-2020 |
| Jess Bishop | BI Ferry | Pelagic | Offshore | 05-Mar-2020 |
| Alex Patterson | BI Ferry | Pelagic | Offshore | 02-Feb-2020 |
| Greg Nemes | Block Island Ferry | Pelagic | Offshore | 02-Feb-2020 |
| Carlos Pedro | Block Island Ferry | Pelagic | Offshore | 30-Jan-2020 |
| Don Heitzmann | Block Island Ferry | Pelagic | Offshore | 29-Jan-2020 |
| Jan St.Jean | Ferry to block island | Pelagic | Offshore | 29-Jan-2020 |
| Dick & Marge Bradley | Block Island ferry | Narragansett | Washington | 26-Jan-2020 |
| Sue Palmer | BI Ferry pelagic | Narragansett | Washington | 26-Jan-2020 |
| Matt Schenck | Beavertail State Park | Jamestown | Newport | 12-Jan-2020 |