Ephemeroptera
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Nydammen | Trøndelag, Norway | 1 | 1 | 0 | 2015-09-18 | |
| Nøklevann | Oslo, Norway | 16 | 8 | 0 | 1993-06-10 | |
| Nøklevatnet | Innlandet, Norway | 4 | 3 | 0 | 1990-06-06 | |
| Odderøya | Agder, Norway | 3 | 1 | 0 | 2007-08-31 | |
| Oftenesbekken | Agder, Norway | 31 | 4 | 0 | 2002-08-30 | |
| Oltervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Oppsjøbekken | Østfold, Norway | 30 | 3 | 0 | 1997-05-28 | |
| Opsangervatnet | Vestland, Norway | 2 | 1 | 0 | 1994-06-03 | |
| Orrtuvatnet | Vestland, Norway | 1 | 1 | 0 | 2016-04-21 | |
| Ortunvannet | Vestland, Norway | 1 | 1 | 0 | 2016-04-21 | |
| Ortuvannet | Vestland, Norway | 1 | 1 | 1 | 2014-10-29 | |
| Parken ved kirka på Melbu | Nordland, Norway | 1 | 1 | 0 | 2013-09-30 | |
| Polljavatnelva | Vestland, Norway | 11 | 3 | 0 | 1993-11-04 | |
| Prestebekken | Agder, Norway | 12 | 3 | 0 | 1994-10-05 | |
| Prestvatn | Agder, Norway | 5 | 3 | 0 | 1992-09-11 | |
| Pytt ved Strand gård | Trøndelag, Norway | 1 | 1 | 0 | 2004-08-14 | |
| Ramdalsbekken | Trøndelag, Norway | 3 | 3 | 0 | 1994-06-15 | |
| Reiarsvatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-06-07 | |
| Rognbekken | Telemark, Norway | 39 | 3 | 0 | 1995-10-04 | |
| Rogåna | Agder, Norway | 14 | 3 | 0 | 1996-10-28 | |
| Romsdalsmuseet, dammen ved Per Amdams v. | Møre og Romsdal, Norway | 2 | 2 | 0 | 2013-09-03 | |
| rosholtkjenna | Agder, Norway | 1 | 1 | 0 | 2005-05-21 | |
| Rossevatn | Rogaland, Norway | 18 | 7 | 0 | 1993-09-20 | |
| Rullestadtjern | Akershus, Norway | 1 | 1 | 0 | 1991-09-19 | |
| Rundvannet | Troms, Norway | 16 | 7 | 0 | 1994-09-02 | |
| Røldalstjørnet | Vestland, Norway | 6 | 3 | 0 | 1993-06-08 | |
| Rørvatnet | Møre og Romsdal, Norway | 9 | 4 | 0 | 1995-09-05 | |
| Røyvannet | Telemark, Norway | 11 | 9 | 0 | 2000-09-22 | |
| Sagtjernet | Innlandet, Norway | 17 | 12 | 0 | 1994-10-04 | |
| Salamanderdam, Solandsbakkane | Rogaland, Norway | 1 | 1 | 0 | 2013-09-29 | |
| Sandalselva | Vestland, Norway | 1 | 1 | 0 | 2005-09-05 | |
| Sandvikselva 1 | Akershus, Norway | 2 | 1 | 0 | 2008-10-22 | |
| Seljebøvatnet | Møre og Romsdal, Norway | 16 | 7 | 0 | 1994-06-13 | |
| Semdammen | Telemark, Norway | 1 | 1 | 0 | 2013-09-04 | |
| Semsvannet | Akershus, Norway | 8 | 6 | 0 | 1994-05-18 | |
| Sillongen | Innlandet, Norway | 1 | 1 | 0 | 1990-05-22 | |
| Sjølisjøen | Innlandet, Norway | 1 | 1 | 0 | 2008-09-16 | |
| Skarvatnet | Møre og Romsdal, Norway | 8 | 6 | 0 | 1995-09-07 | |
| Skithegga | Akershus, Norway | 1 | 1 | 0 | 2014-10-13 | |
| Skithegga | Akershus, Norway | 30 | 6 | 0 | 2014-10-13 | |
| Skjelbreidvatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skoklefalltjernet | Akershus, Norway | 1 | 1 | 0 | 2013-09-25 | |
| Skoltjønna | Nordland, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Skomakerdiket | Vestland, Norway | 2 | 1 | 0 | 2013-09-25 | |
| Skomakerdiket | Vestland, Norway | 2 | 1 | 0 | 2012-09-12 | |
| Skranevatnet | Vestland, Norway | 24 | 1 | 1 | 2013-05-30 | |
| Skutleselvi | Vestland, Norway | 28 | 3 | 0 | 1998-09-18 | |
| Smeneselva | Møre og Romsdal, Norway | 41 | 3 | 0 | 1996-08-27 | |
| Sognsvann | Oslo, Norway | 2 | 1 | 0 | 2005-05-23 | |
| Solheimsvannet | Vestland, Norway | 2 | 1 | 0 | 2015-09-07 |