Species: Toøyd flatigle (Helobdella stagnalis)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 1 |
| 2013 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 1 | 1 | 1 |
| 1999 | 1 | 1 | 1 | 1 |
| 1993 | 1 | 4 | 4 | 4 |
| 1992 | 1 | 9 | 10 | 13 |
| 1991 | 1 | 7 | 7 | 8 |
| 1990 | 1 | 15 | 14 | 15 |
| 1989 | 1 | 18 | 19 | 19 |
| Totalt alle år | 1 | 39 | 39 | 63 |
