Species: Oter (Lutra lutra)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2024 | 1 | 26 | 26 | 26 |
| 2023 | 1 | 25 | 25 | 25 |
| 2022 | 1 | 38 | 38 | 41 |
| 2021 | 1 | 34 | 33 | 35 |
| 2020 | 1 | 19 | 19 | 21 |
| 2019 | 1 | 20 | 20 | 21 |
| 2018 | 1 | 9 | 9 | 9 |
| 2016 | 1 | 2 | 2 | 2 |
| 2011 | 1 | 3 | 3 | 5 |
| 2007 | 1 | 2 | 2 | 2 |
| 2006 | 1 | 2 | 2 | 2 |
| 1999 | 1 | 2 | 2 | 3 |
| 1998 | 1 | 2 | 2 | 2 |
| 1997 | 1 | 5 | 5 | 6 |
| 1996 | 1 | 2 | 2 | 2 |
| 1995 | 1 | 6 | 6 | 7 |
| 1994 | 1 | 7 | 7 | 8 |
| 1993 | 1 | 13 | 13 | 15 |
| Totalt alle år | 1 | 177 | 172 | 232 |