Littorina sp.
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Frydenlund skole | Nordland, Norway | 131 | 1 | 0 | 1998-11-24 |
| Brunla ungdomsskole | Vestfold, Norway | 109 | 1 | 0 | 1998-09-18 |
| Grødem skole | Rogaland, Norway | 81 | 1 | 0 | 1997-10-14 |
| Mesterfjellet ungdomsskole | Vestfold, Norway | 78 | 1 | 0 | 1998-09-24 |
| Myklebust skule | Møre og Romsdal, Norway | 75 | 1 | 0 | 1997-10-09 |
| Hauge skole | Rogaland, Norway | 72 | 1 | 0 | 1997-10-16 |
| Hårkollen skole | Vestfold, Norway | 69 | 1 | 0 | 1998-09-24 |
| Borgheim ungdomsskole | Vestfold, Norway | 67 | 1 | 0 | 1998-09-21 |
| Færder videregående skole | Vestfold, Norway | 67 | 1 | 0 | 1997-10-28 |
| Tromøy ungdomsskole | Agder, Norway | 65 | 1 | 0 | 1998-09-26 |
| Tingsaker skole | Agder, Norway | 65 | 1 | 0 | 1998-09-24 |
| Store Bergan skole | Vestfold, Norway | 64 | 1 | 0 | 1998-09-17 |
| Ranvik ungdomsskole | Vestfold, Norway | 58 | 1 | 0 | 1997-10-09 |
| Hafrsfjord skole | Rogaland, Norway | 56 | 1 | 0 | 1998-09-28 |
| Harøy skule | Møre og Romsdal, Norway | 54 | 1 | 0 | 1998-10-30 |
| Torød skole | Vestfold, Norway | 54 | 1 | 0 | 1998-09-18 |
| Helgerød skole | Vestfold, Norway | 51 | 1 | 0 | 1998-09-17 |
| Tvedestrand skole | Agder, Norway | 51 | 1 | 0 | 1998-09-24 |
| Berg skole | Vestfold, Norway | 51 | 1 | 0 | 1997-09-24 |
| Melsom videregående skole | Vestfold, Norway | 47 | 1 | 0 | 1998-09-22 |
| Hisøy ungdomsskole | Agder, Norway | 47 | 1 | 0 | 1997-10-02 |
| Brentemoen skole | Agder, Norway | 46 | 1 | 0 | 1997-10-02 |
| Stokke ungdomsskole | Vestfold, Norway | 45 | 1 | 0 | 1998-09-22 |
| Liland skole | Nordland, Norway | 45 | 1 | 0 | 2003-09-30 |
| Ytterøy skole | Trøndelag, Norway | 45 | 1 | 0 | 1997-09-23 |
| Jordet skole | Vestfold, Norway | 45 | 1 | 0 | 2004-09-02 |
| Bjerkvik barne- og ungdomsskole | Nordland, Norway | 44 | 1 | 0 | 1998-09-29 |
| Stinta skole barne- og Ungdomstrinnet | Agder, Norway | 42 | 1 | 0 | 1997-10-03 |
| Åheim skule | Møre og Romsdal, Norway | 40 | 1 | 0 | 1997-10-08 |
| Grasmyr ungdomsskole | Telemark, Norway | 39 | 1 | 0 | 1998-09-23 |
| Samfundets skole Egersund | Rogaland, Norway | 38 | 1 | 0 | 2015-09-21 |
| Husvik skole | Vestfold, Norway | 37 | 1 | 0 | 1997-09-16 |
| Hundvåg skole | Rogaland, Norway | 37 | 1 | 0 | 1998-10-12 |
| Sjøholt skule | Møre og Romsdal, Norway | 36 | 1 | 0 | 1998-09-30 |
| Erdal ungdomsskole | Vestland, Norway | 35 | 1 | 0 | 1995-10-13 |
| Harstad ungdomsskole | Troms, Norway | 35 | 1 | 0 | 1997-10-09 |
| Nærbø ungdomsskule | Rogaland, Norway | 34 | 1 | 0 | 1998-10-02 |
| Sandeåsen skole | Vestfold, Norway | 34 | 1 | 0 | 1997-10-09 |
| Tofte ungdomsskole | Akershus, Norway | 32 | 1 | 0 | 1996-09-20 |
| Tjodalyng ungdomsskole | Vestfold, Norway | 32 | 1 | 0 | 1997-09-16 |
| Hvaler ungdomsskole | Østfold, Norway | 32 | 1 | 0 | 1996-09-25 |
| Nordstrand videregående skole | Oslo, Norway | 30 | 1 | 0 | 1996-10-21 |
| Varden ungdomsskole | Vestfold, Norway | 30 | 1 | 0 | 1997-05-26 |
| Granly skole | Vestfold, Norway | 30 | 1 | 0 | 1997-10-07 |
| Kirkevoll skole | Vestfold, Norway | 30 | 1 | 0 | 1996-09-26 |
| Moltemyr skole | Agder, Norway | 29 | 1 | 0 | 1997-10-14 |
| Ringshaug ungdomsskole | Vestfold, Norway | 29 | 1 | 0 | 1997-09-26 |
| Strand skole | Nordland, Norway | 29 | 1 | 0 | 1996-09-16 |
| Austbø skole | Rogaland, Norway | 29 | 1 | 0 | 1997-10-14 |
| Giske skule | Møre og Romsdal, Norway | 28 | 1 | 0 | 1997-09-25 |