Family: Svelgigler (Erpobdellidae)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Akersvannet | Vestfold, Norway | 2 | 1 | 0 | 1990-10-19 | |
| Apeltunvatnet | Vestland, Norway | 3 | 1 | 0 | 2011-06-06 | |
| Audemotland | Rogaland, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Dælivannet | Akershus, Norway | 2 | 1 | 0 | 1991-09-07 | |
| ebbestadvann | Buskerud, Norway | 1 | 1 | 0 | 2002-05-23 | |
| Eikedokktjernet | Buskerud, Norway | 1 | 1 | 0 | 1990-06-06 | |
| Fløyta | Akershus, Norway | 3 | 1 | 0 | 1993-05-27 | |
| Frøylandsvatnet | Rogaland, Norway | 5 | 1 | 0 | 1993-06-01 | |
| Harestuvannet | Akershus, Norway | 2 | 1 | 0 | 1991-09-13 | |
| Hegglandsvatnet | Vestland, Norway | 1 | 1 | 0 | 1993-06-02 | |
| Illestadvatnet | Vestfold, Norway | 2 | 1 | 0 | 2002-08-27 | |
| Jarenvannet | Innlandet, Norway | 2 | 1 | 0 | 1990-08-28 | |
| Kolbjørnviksjøen | Østfold, Norway | 2 | 1 | 0 | 1993-06-10 | |
| Kolbotnvannet | Akershus, Norway | 1 | 1 | 0 | 1992-06-04 | |
| Korssjøen | Vestfold, Norway | 2 | 1 | 0 | 1992-09-08 | |
| Kverndammen | Telemark, Norway | 5 | 1 | 0 | 1991-08-30 | |
| Ljøgodttjern | Akershus, Norway | 2 | 1 | 0 | 1990-05-31 | |
| Longvatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-06-01 | |
| Molbekktjernet | Østfold, Norway | 1 | 1 | 0 | 1990-09-13 | |
| Mosvatnet | Rogaland, Norway | 1 | 1 | 0 | 1993-06-02 | |
| Myravatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-10 | |
| Nesttunvannet | Vestland, Norway | 1 | 1 | 0 | 1991-06-06 | |
| Nøklevann | Oslo, Norway | 2 | 1 | 0 | 1992-06-11 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Rullestadtjern | Akershus, Norway | 1 | 1 | 0 | 1991-09-19 | |
| Røyvannet | Telemark, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Semsvannet | Akershus, Norway | 2 | 1 | 0 | 1993-05-26 | |
| Sognsvann | Oslo, Norway | 1 | 1 | 0 | 2005-05-23 | |
| Solheimsvannet | Vestland, Norway | 5 | 1 | 0 | 2015-09-02 | |
| Stavsjø | Innlandet, Norway | 7 | 1 | 0 | 1991-10-14 | |
| Sætertjern | Akershus, Norway | 1 | 1 | 0 | 1990-09-12 | |
| Tranevatnet | Vestland, Norway | 3 | 1 | 1 | 2007-05-29 | |
| Tveitevannet | Vestland, Norway | 2 | 1 | 0 | 1992-09-10 | |
| Årungen | Akershus, Norway | 3 | 1 | 0 | 1992-09-20 | |