Species: Hesterumpe (Hippuris vulgaris)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Bogstadvannet | Oslo, Norway | 1 | 1 | 0 | 1994-06-06 | |
| Estenstadmarka | Trøndelag, Norway | 1 | 1 | 0 | 2013-06-07 | |
| Fetvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-29 | |
| Fæbydammen | Trøndelag, Norway | 1 | 1 | 0 | 2003-09-12 | |
| Glitredammen | Akershus, Norway | 2 | 1 | 0 | 2006-09-01 | |
| Grindheimsvatnet | Agder, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Grunningen | Innlandet, Norway | 1 | 1 | 0 | 2012-09-20 | |
| Gåstjønna | Nordland, Norway | 1 | 1 | 0 | 1989-09-12 | |
| Haukvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2013-06-05 | |
| Helsetvatnet | Møre og Romsdal, Norway | 5 | 1 | 0 | 2009-05-28 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Korssjøen | Vestfold, Norway | 1 | 1 | 0 | 1993-09-09 | |
| Kverndammen | Telemark, Norway | 1 | 1 | 0 | 1989-09-26 | |
| Kvitblikkvannet | Nordland, Norway | 3 | 1 | 0 | 1993-09-02 | |
| Laksådalsvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Laupen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Lauvtjønna | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Lundarvatnet | Vestland, Norway | 1 | 1 | 0 | 1994-11-24 | |
| Madsvannet | Nordland, Norway | 1 | 1 | 0 | 1990-09-22 | |
| Meitjenn | Telemark, Norway | 1 | 1 | 0 | 2004-09-13 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Moensvatnet | Vestland, Norway | 1 | 1 | 0 | 1989-11-07 | |
| Myklavatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-25 | |
| Myklebustvannet | Møre og Romsdal, Norway | 2 | 1 | 0 | 1990-09-13 | |
| Nøklevann | Oslo, Norway | 1 | 1 | 0 | 1989-10-04 | |
| Oltervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Opsangervatnet | Vestland, Norway | 2 | 1 | 0 | 1993-06-09 | |
| Rundvannet | Troms, Norway | 1 | 1 | 0 | 1989-09-12 | |
| Skarvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Stavsjø | Innlandet, Norway | 1 | 1 | 0 | 1989-09-05 | |
| Stordammen | Akershus, Norway | 1 | 1 | 0 | 1989-09-08 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Vikerauntjønna | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Øvre Storfjordvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-01 | |