Species: Storstrandsnegl (Littorina littorea)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2017 | 1 | 2 | 1 | 2 |
| 2016 | 1 | 2 | 2 | 2 |
| 2015 | 1 | 1 | 1 | 1 |
| 2014 | 1 | 16 | 10 | 27 |
| 2013 | 1 | 10 | 8 | 13 |
| 2010 | 1 | 4 | 3 | 4 |
| 2008 | 1 | 2 | 2 | 2 |
| 2007 | 1 | 2 | 2 | 2 |
| 2006 | 1 | 1 | 1 | 2 |
| 2004 | 1 | 1 | 1 | 1 |
| 2003 | 1 | 2 | 2 | 5 |
| 2002 | 1 | 2 | 2 | 2 |
| 2001 | 1 | 1 | 1 | 2 |
| 2000 | 1 | 1 | 1 | 1 |
| 1997 | 1 | 3 | 3 | 5 |
| Totalt alle år | 1 | 44 | 33 | 71 |
