Hirudidae
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Sylling skole | Buskerud, Norway | 11 | 1 | 0 | 2013-09-06 |
| Blussuvoll skole | Trøndelag, Norway | 4 | 2 | 0 | 2013-06-07 |
| Rå skole | Vestland, Norway | 3 | 2 | 0 | 2009-06-08 |
| Porsgrunn videregående skole | Telemark, Norway | 3 | 1 | 0 | 1991-08-30 |
| Bergen Kristne grunnskole | Vestland, Norway | 2 | 1 | 1 | 2015-05-29 |
| Jessheim videregående skole | Akershus, Norway | 2 | 1 | 0 | 1990-05-31 |
| John Skartveit | Vestland, Norway | 2 | 1 | 1 | 2009-05-30 |
| roy allan thomassen | Møre og Romsdal, Norway | 2 | 2 | 0 | 2011-06-08 |
| Søreide skole | Vestland, Norway | 2 | 1 | 0 | 2013-03-21 |
| Valler videregående skole | Akershus, Norway | 2 | 1 | 0 | 1991-09-07 |
| Askim videregående skole | Østfold, Norway | 2 | 1 | 0 | 1992-09-02 |
| Alversund skule | Vestland, Norway | 2 | 1 | 1 | 2006-05-04 |
| Belset skole | Akershus, Norway | 1 | 1 | 0 | 2004-09-03 |
| Grymyr skole | Innlandet, Norway | 1 | 1 | 0 | 2012-09-26 |
| Jaren skole | Innlandet, Norway | 1 | 1 | 0 | 2013-09-27 |
| Eidet skole | Nordland, Norway | 1 | 1 | 0 | 2013-09-26 |
| Rindal skole | Trøndelag, Norway | 1 | 1 | 0 | 2009-09-08 |
| Kyrkjekrinsen skole | Vestland, Norway | 1 | 1 | 0 | 2020-06-12 |
| Pål Biseth | Vestland, Norway | 1 | 1 | 0 | 2012-04-04 |
| Vøyenenga skole | Akershus, Norway | 1 | 1 | 0 | 2008-10-22 |
| Vardafjell videregående skole | Rogaland, Norway | 1 | 1 | 0 | 1990-06-07 |
| Åsmund Berg | Innlandet, Norway | 1 | 1 | 1 | 2020-06-11 |
| Kopervik videregående skole | Rogaland, Norway | 1 | 1 | 0 | 1991-09-17 |
| Hamar katedralskole | Innlandet, Norway | 1 | 1 | 0 | 1991-10-14 |
| Asker videregående skole | Akershus, Norway | 1 | 1 | 0 | 1989-09-21 |
| Elverum videregående skole | Innlandet, Norway | 1 | 1 | 0 | 1992-06-16 |
| Mandal videregående skole | Agder, Norway | 1 | 1 | 0 | 1991-06-11 |
| Fana gymnas | Vestland, Norway | 1 | 1 | 0 | 1991-06-06 |
| Hjellestad skole | Vestland, Norway | 1 | 1 | 0 | 2012-04-26 |
| Losby besøksgård | Akershus, Norway | 1 | 1 | 0 | 2009-06-23 |
| Lone skule | Vestland, Norway | 1 | 1 | 0 | 2004-10-14 |
| Nyborg skole | Trøndelag, Norway | 1 | 1 | 0 | 2021-09-03 |
| Sveberg skole | Trøndelag, Norway | 1 | 1 | 0 | 2014-05-19 |