Family: Vannkjærer (Hydrophilidae)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 4 | 2 | 9 |
| 2013 | 1 | 2 | 2 | 6 |
| 2002 | 1 | 2 | 2 | 2 |
| 2000 | 1 | 1 | 1 | 2 |
| 1999 | 1 | 1 | 1 | 1 |
| 1997 | 3 | 5 | 4 | 6 |
| 1992 | 5 | 5 | 5 | 6 |
| 1991 | 5 | 7 | 7 | 10 |
| 1990 | 8 | 11 | 11 | 14 |
| 1989 | 2 | 4 | 4 | 4 |
| Totalt alle år | 12 | 34 | 31 | 60 |
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