Species: Vanlig damsnegl (Lymnaea peregra)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Akersvannet | Vestfold, Norway | 3 | 1 | 0 | 1995-09-07 | |
| Apeltunvatnet | Vestland, Norway | 1 | 1 | 0 | 2009-06-08 | |
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-06-07 | |
| Bergemsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1990-10-04 | |
| Bergsvatnet | Vestland, Norway | 1 | 1 | 0 | 1995-09-22 | |
| Bergvikvatnet | Nordland, Norway | 5 | 1 | 0 | 1993-09-13 | |
| Bogstadvannet | Oslo, Norway | 2 | 1 | 0 | 1994-06-06 | |
| Dælivannet | Akershus, Norway | 2 | 1 | 0 | 1990-09-03 | |
| Eidsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1990-09-12 | |
| Fetvatnet | Møre og Romsdal, Norway | 2 | 1 | 0 | 1990-09-18 | |
| Floen | Vestland, Norway | 1 | 1 | 0 | 1996-05-14 | |
| Frøylandsvatnet | Rogaland, Norway | 6 | 1 | 0 | 1993-09-29 | |
| Gjølsjøen | Østfold, Norway | 1 | 1 | 0 | 1996-06-11 | |
| Granavatnet | Trøndelag, Norway | 5 | 1 | 0 | 1995-09-01 | |
| Gravdalsvatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-25 | |
| Gullerudtjern | Buskerud, Norway | 2 | 1 | 0 | 1990-05-31 | |
| Hammervatnet | Trøndelag, Norway | 10 | 1 | 0 | 1996-10-17 | |
| Harestuvannet | Akershus, Norway | 5 | 1 | 0 | 1996-08-30 | |
| Haukvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-22 | |
| Hegglandsvatnet | Vestland, Norway | 1 | 1 | 0 | 1993-06-02 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1993-06-11 | |
| Hostadvatnet | Møre og Romsdal, Norway | 2 | 1 | 0 | 1993-06-16 | |
| Håskjoldtjern | Møre og Romsdal, Norway | 2 | 1 | 0 | 1992-08-20 | |
| Ibestadvatnet | Troms, Norway | 3 | 1 | 0 | 1992-06-17 | |
| Jarenvannet | Innlandet, Norway | 6 | 1 | 0 | 1996-09-18 | |
| Jåbekkvannet | Agder, Norway | 3 | 1 | 0 | 1993-09-27 | |
| Kjemsjøen | Innlandet, Norway | 8 | 1 | 0 | 1995-06-06 | |
| Klevatn | Nordland, Norway | 2 | 1 | 0 | 1993-09-06 | |
| Knurrvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-08-30 | |
| Kolbjørnviksjøen | Østfold, Norway | 2 | 1 | 0 | 1993-09-09 | |
| Koltjønna | Trøndelag, Norway | 2 | 1 | 0 | 1994-06-02 | |
| Korssjøen | Vestfold, Norway | 6 | 1 | 0 | 1996-09-09 | |
| Kverndammen | Telemark, Norway | 1 | 1 | 0 | 1992-10-14 | |
| Kvitblikkvannet | Nordland, Norway | 5 | 1 | 0 | 1993-06-03 | |
| Laksådalsvatnet | Nordland, Norway | 6 | 1 | 0 | 1994-08-06 | |
| Langavatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-25 | |
| Laupen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Lauvtjønna | Trøndelag, Norway | 3 | 1 | 0 | 1993-06-11 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Lianvatnet | Trøndelag, Norway | 6 | 1 | 0 | 1996-09-04 | |
| Liavatnet | Vestland, Norway | 1 | 1 | 0 | 1994-06-06 | |
| Liavatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Litlevatn | Møre og Romsdal, Norway | 2 | 1 | 0 | 1995-08-28 | |
| Litlvatnet | Trøndelag, Norway | 3 | 1 | 0 | 1992-06-09 | |
| Madsvannet | Nordland, Norway | 1 | 1 | 0 | 1990-09-22 | |
| Mannslagervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-08-30 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1993-09-19 | |
| Moensvatnet | Vestland, Norway | 4 | 1 | 0 | 1993-09-29 | |
| Molbekktjernet | Østfold, Norway | 1 | 1 | 0 | 1992-06-01 | |
| Mosvatnet | Rogaland, Norway | 6 | 1 | 0 | 1995-09-19 | |