Hygrotus
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Arkavatnet | Rogaland, Norway | 2 | 2 | 0 | 1992-09-22 | |
| Dælivannet | Akershus, Norway | 1 | 1 | 0 | 1991-09-07 | |
| Frøylandsvatnet | Rogaland, Norway | 2 | 2 | 0 | 1992-09-16 | |
| Gravdalsvatnet | Vestland, Norway | 2 | 1 | 0 | 1990-09-25 | |
| Gullerudtjern | Buskerud, Norway | 1 | 1 | 0 | 1991-06-06 | |
| Hauskjevatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-09-26 | |
| Hegglandsvatnet | Vestland, Norway | 1 | 1 | 0 | 1991-09-01 | |
| Husavatnet | Vestland, Norway | 4 | 1 | 0 | 1992-09-18 | |
| Jarenvannet | Innlandet, Norway | 2 | 1 | 0 | 1991-08-27 | |
| Jåbekkvannet | Agder, Norway | 1 | 1 | 0 | 1991-06-11 | |
| Kjemsjøen | Innlandet, Norway | 1 | 1 | 0 | 1991-06-10 | |
| Kolbjørnviksjøen | Østfold, Norway | 5 | 1 | 0 | 1992-09-02 | |
| Lianvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1992-09-07 | |
| Maltjern | Akershus, Norway | 5 | 4 | 0 | 1992-06-23 | |
| Myklebustvannet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1991-06-03 | |
| Nøklevann | Oslo, Norway | 2 | 1 | 0 | 1992-06-10 | |
| Opsangervatnet | Vestland, Norway | 3 | 2 | 0 | 1992-06-15 | |
| Prestvatn | Agder, Norway | 1 | 1 | 0 | 1992-09-11 | |
| Rossevatn | Rogaland, Norway | 6 | 2 | 0 | 1992-09-22 | |
| Sagtjernet | Innlandet, Norway | 2 | 1 | 0 | 1992-09-21 | |
| Semsvannet | Akershus, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Tornesvatnet | Rogaland, Norway | 2 | 2 | 0 | 1991-09-13 | |
| Tveitavatnet | Vestland, Norway | 2 | 1 | 0 | 1992-10-01 | |
| Tveitevannet | Vestland, Norway | 1 | 1 | 0 | 1990-08-28 | |
| Vasslivatnet | Rogaland, Norway | 2 | 2 | 0 | 1992-06-04 | |
| Årungen | Akershus, Norway | 5 | 1 | 0 | 1997-09-12 | |
| Åstveitvannet | Vestland, Norway | 3 | 1 | 0 | 1991-09-27 |