Species: Stor vannkalv (Dytiscus marginalis)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2019 | 1 | 1 | 1 | 1 |
| 2014 | 1 | 1 | 1 | 1 |
| 2013 | 1 | 5 | 5 | 9 |
| 2012 | 1 | 5 | 5 | 7 |
| 2009 | 1 | 3 | 2 | 3 |
| 2008 | 1 | 3 | 2 | 3 |
| 2007 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 1 | 1 | 1 |
| 2001 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 2 | 2 | 2 |
| 1991 | 1 | 2 | 3 | 3 |
| 1990 | 1 | 4 | 4 | 5 |
| 1989 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 29 | 27 | 38 |