Species: Beaver (Castor fiber)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2022 | 1 | 1 | 1 | 1 |
| 2021 | 1 | 1 | 1 | 2 |
| 2020 | 1 | 1 | 1 | 1 |
| 2013 | 1 | 2 | 2 | 19 |
| 2012 | 1 | 3 | 3 | 3 |
| 2009 | 1 | 2 | 1 | 3 |
| 2008 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 1 | 1 | 1 |
| 2002 | 1 | 1 | 1 | 1 |
| 2001 | 1 | 1 | 1 | 1 |
| 2000 | 1 | 1 | 1 | 1 |
| 1999 | 1 | 1 | 1 | 1 |
| 1995 | 1 | 1 | 1 | 1 |
| 1994 | 1 | 5 | 5 | 5 |
| 1993 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 23 | 21 | 44 |