Species: Mute Swan (Cygnus olor)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2024 | 1 | 31 | 31 | 31 |
| 2023 | 1 | 36 | 34 | 47 |
| 2022 | 1 | 47 | 47 | 48 |
| 2021 | 1 | 41 | 41 | 48 |
| 2020 | 1 | 39 | 36 | 42 |
| 2019 | 1 | 50 | 49 | 52 |
| 2018 | 1 | 39 | 38 | 42 |
| 2017 | 1 | 25 | 25 | 27 |
| 2016 | 1 | 33 | 32 | 36 |
| 2015 | 1 | 30 | 30 | 33 |
| 2014 | 1 | 20 | 20 | 26 |
| 2013 | 1 | 14 | 12 | 27 |
| 2012 | 1 | 14 | 14 | 21 |
| 2011 | 1 | 14 | 14 | 15 |
| 2010 | 1 | 9 | 8 | 11 |
| 2009 | 1 | 2 | 2 | 2 |
| 2008 | 1 | 5 | 5 | 5 |
| 2007 | 1 | 2 | 2 | 2 |
| 2002 | 1 | 3 | 3 | 3 |
| 2001 | 1 | 3 | 3 | 3 |
| 1994 | 1 | 6 | 6 | 6 |
| 1993 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 1 | 1 | 1 |
| 1990 | 1 | 1 | 1 | 1 |
| 1989 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 308 | 284 | 531 |