Betula pendula (Silver birch)
| Deltaker | Kommune (fylke) | Ant. obs. | Ant. arter | Ant. bilder | Siste obs. |
|---|---|---|---|---|---|
| Re videregående skole | Vestfold, Norway | 8 | 1 | 0 | 2022-09-02 |
| Vålerenga skole | Oslo, Norway | 8 | 1 | 10 | 2022-09-30 |
| Stiftelsen Soon Sjøskole | Akershus, Norway | 4 | 1 | 5 | 2022-10-17 |
| Stryn vidaregåande skule | Vestland, Norway | 4 | 1 | 1 | 2024-09-26 |
| Hesnes Montessoriskole | Agder, Norway | 3 | 1 | 0 | 2007-11-14 |
| Bodin videregående skole | Nordland, Norway | 3 | 1 | 0 | 2021-08-27 |
| Trysil ungdomsskole | Innlandet, Norway | 3 | 1 | 2 | 2022-09-22 |
| Vestbygda ungdomsskole | Østfold, Norway | 2 | 1 | 2 | 2022-10-12 |
| Byskogen skole | Vestfold, Norway | 2 | 1 | 0 | 2010-04-30 |
| Arstad skole | Innlandet, Norway | 2 | 1 | 1 | 2022-09-23 |
| Mardon Hjelle | Møre og Romsdal, Norway | 2 | 1 | 0 | 2008-10-09 |
| Torunn Hansen | Nordland, Norway | 2 | 1 | 0 | 2011-04-26 |
| Dalsøyra skule | Vestland, Norway | 1 | 1 | 0 | 2022-08-30 |
| Blussuvoll skole | Trøndelag, Norway | 1 | 1 | 1 | 2013-06-07 |
| Gunvor Hustoft | Rogaland, Norway | 1 | 1 | 0 | 2011-04-20 |
| Kjersti Nerbråten | Innlandet, Norway | 1 | 1 | 0 | 2007-04-16 |
| Kirkebygden barne- og ungdomsskole | Akershus, Norway | 1 | 1 | 0 | 2022-09-15 |
| Olav Julsrud | Oslo, Norway | 1 | 1 | 0 | 2013-06-20 |
| Liv Marie Sæther Sandberg | Innlandet, Norway | 1 | 1 | 0 | 2020-04-23 |
| Jørpeland ungdomsskole | Rogaland, Norway | 1 | 1 | 1 | 2014-06-03 |
| Danielsen ungdomsskule Osterøy AS | Vestland, Norway | 1 | 1 | 0 | 2022-09-12 |
| Greverud skole | Akershus, Norway | 1 | 1 | 0 | 2022-08-30 |
| Stranda vidaregåande skule | Møre og Romsdal, Norway | 1 | 1 | 0 | 2014-09-08 |