Ephemeroptera
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Lierbekken | Vestland, Norway | 3 | 3 | 0 | 1996-04-30 | |
| Lille Haukdalsvatn | Finnmark, Norway | 5 | 1 | 0 | 2011-09-05 | |
| Lille luktvann | Nordland, Norway | 1 | 1 | 0 | 1991-09-25 | |
| Lillestrøm ved Nittelva | Akershus, Norway | 1 | 1 | 0 | 2013-09-13 | |
| Lilleåna, Haihølen | Agder, Norway | 1 | 1 | 0 | 2013-06-10 | |
| Lindalsbekken | Agder, Norway | 2 | 2 | 0 | 1994-10-17 | |
| Lisjeelva | Møre og Romsdal, Norway | 3 | 1 | 0 | 2003-09-12 | |
| Lisselva | Trøndelag, Norway | 37 | 3 | 0 | 1996-06-11 | |
| Litjvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2004-08-14 | |
| Litlevatn | Møre og Romsdal, Norway | 3 | 2 | 0 | 1996-09-28 | |
| Ljøgodttjern | Akershus, Norway | 4 | 2 | 0 | 1993-08-30 | |
| Lomma | Akershus, Norway | 3 | 3 | 0 | 1997-04-30 | |
| Lommedalselva 1 | Akershus, Norway | 2 | 1 | 0 | 2008-10-23 | |
| Lone | Vestland, Norway | 2 | 1 | 2 | 2015-05-18 | |
| Loneelva | Vestland, Norway | 1 | 1 | 0 | 2005-09-06 | |
| Longvatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-09-28 | |
| Losby besøksgård | Akershus, Norway | 2 | 2 | 0 | 2008-06-24 | |
| Lundarvatnet | Vestland, Norway | 4 | 4 | 0 | 1993-05-13 | |
| Lysevatnet | Rogaland, Norway | 2 | 2 | 0 | 1991-10-03 | |
| Lødingen | Nordland, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Madsvannet | Nordland, Norway | 2 | 2 | 0 | 1991-09-12 | |
| Maltjern | Akershus, Norway | 3 | 2 | 0 | 1992-06-23 | |
| Mellombekken | Innlandet, Norway | 5 | 3 | 0 | 1995-06-13 | |
| Merkestjørna | Vestland, Norway | 4 | 2 | 0 | 1995-06-01 | |
| Midsjøvannet | Akershus, Norway | 3 | 3 | 0 | 1993-09-19 | |
| Mildevatnet | Vestland, Norway | 13 | 1 | 0 | 2012-04-19 | |
| Moensvatnet | Vestland, Norway | 10 | 4 | 0 | 1994-11-01 | |
| Molbekktjernet | Østfold, Norway | 8 | 5 | 0 | 1992-06-01 | |
| Moloen ved skolen | Innlandet, Norway | 1 | 1 | 0 | 2015-09-07 | |
| Monsknutepytten | Agder, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Mosvatnet | Rogaland, Norway | 5 | 3 | 0 | 1995-09-14 | |
| Murttjernbekken | Østfold, Norway | 16 | 3 | 0 | 1996-10-23 | |
| Myklavatn | Vestland, Norway | 1 | 1 | 0 | 2013-09-20 | |
| Myklavatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-25 | |
| Myravatnet | Vestland, Norway | 1 | 1 | 0 | 2007-05-03 | |
| Myrvann sør Fjellstadkrysset | Oslo, Norway | 1 | 1 | 0 | 2013-09-29 | |
| Mørkevatnet | Vestland, Norway | 1 | 1 | 0 | 2013-09-04 | |
| Møylandsletta | Vestfold, Norway | 1 | 1 | 0 | 2013-09-20 | |
| Måkkevæjbekken | Finnmark, Norway | 5 | 3 | 0 | 1995-06-21 | |
| Nesttun Vassdraget | Vestland, Norway | 3 | 1 | 0 | 2015-08-24 | |
| Nesttunelven | Vestland, Norway | 9 | 1 | 0 | 2013-05-03 | |
| Nesttunvannet | Vestland, Norway | 1 | 1 | 0 | 1991-06-06 | |
| Nitelva | Akershus, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Nitelva | Akershus, Norway | 1 | 1 | 0 | 2013-09-26 | |
| Nitelva | Akershus, Norway | 6 | 3 | 0 | 1997-05-29 | |
| Nitelva | Akershus, Norway | 3 | 3 | 0 | 1996-05-15 | |
| Nitelva ved Smedstusvingen | Akershus, Norway | 2 | 1 | 0 | 2014-06-13 | |
| Nitelva ved Smedstusvingen | Akershus, Norway | 1 | 1 | 0 | 2014-06-11 | |
| Nord i Skoklefaldtjernet | Akershus, Norway | 1 | 1 | 0 | 2013-09-20 | |
| Nordre Øyeren og Sørumsneset naturreserv | Akershus, Norway | 5 | 1 | 0 | 2001-05-15 |