Species: Great Northern Diver (Gavia immer)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2023 | 1 | 1 | 1 | 1 |
| 2022 | 1 | 2 | 2 | 6 |
| 2020 | 1 | 1 | 1 | 1 |
| 2019 | 1 | 2 | 2 | 2 |
| 2010 | 1 | 2 | 2 | 2 |
| 2007 | 1 | 1 | 1 | 2 |
| 2006 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 1 | 1 | 2 |
| Totalt alle år | 1 | 7 | 7 | 17 |
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2023 | 1 | 1 | 1 | 1 |
| 2022 | 1 | 2 | 2 | 6 |
| 2020 | 1 | 1 | 1 | 1 |
| 2019 | 1 | 2 | 2 | 2 |
| 2010 | 1 | 2 | 2 | 2 |
| 2007 | 1 | 1 | 1 | 2 |
| 2006 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 1 | 1 | 2 |
| Totalt alle år | 1 | 7 | 7 | 17 |