Species: Caenis horaria
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Akersvannet | Vestfold, Norway | 2 | 1 | 0 | 1991-09-25 | |
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1991-05-30 | |
| Burudvann | Akershus, Norway | 2 | 1 | 0 | 1993-09-14 | |
| Frøylandsvatnet | Rogaland, Norway | 2 | 1 | 0 | 1993-09-29 | |
| Gåstjønna | Nordland, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Hammervatnet | Trøndelag, Norway | 2 | 1 | 0 | 1990-06-11 | |
| Hostadvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Jåbekkvannet | Agder, Norway | 1 | 1 | 0 | 1993-09-27 | |
| Korssjøen | Vestfold, Norway | 5 | 1 | 0 | 1996-09-09 | |
| Kverndammen | Telemark, Norway | 1 | 1 | 0 | 1991-08-30 | |
| Kvitblikkvannet | Nordland, Norway | 2 | 1 | 0 | 1993-06-03 | |
| Langavatnet | Vestland, Norway | 1 | 1 | 0 | 1989-08-31 | |
| Laupen | Innlandet, Norway | 2 | 1 | 0 | 1991-10-01 | |
| Lauvtjønna | Trøndelag, Norway | 3 | 1 | 0 | 1993-09-06 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Lianvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Liavatnet | Vestland, Norway | 1 | 1 | 0 | 1994-09-14 | |
| Lille luktvann | Nordland, Norway | 1 | 1 | 0 | 1991-09-25 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1993-09-19 | |
| Molbekktjernet | Østfold, Norway | 3 | 1 | 0 | 1992-06-01 | |
| Mosvatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-06-05 | |
| Nøklevann | Oslo, Norway | 2 | 1 | 0 | 1993-06-10 | |
| Rossevatn | Rogaland, Norway | 6 | 1 | 0 | 1993-09-20 | |
| Rundvannet | Troms, Norway | 3 | 1 | 0 | 1994-06-10 | |
| Rørvatnet | Møre og Romsdal, Norway | 4 | 1 | 0 | 1995-09-05 | |
| Sagtjernet | Innlandet, Norway | 1 | 1 | 0 | 1990-06-25 | |
| Stavsjø | Innlandet, Norway | 3 | 1 | 0 | 1991-10-17 | |
| Storavatnet | Vestland, Norway | 5 | 1 | 0 | 1993-09-02 | |
| Tornesvatnet | Rogaland, Norway | 2 | 1 | 0 | 1991-05-30 | |
| Tretjønnet | Agder, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Tveitavatnet | Vestland, Norway | 3 | 1 | 0 | 1991-05-23 | |
| Årungen | Akershus, Norway | 3 | 1 | 0 | 1991-09-16 | |