Tetraedron minimum
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Strinda videregående skole | Trøndelag, Norway | 3 | 1 | 0 | 1990-09-28 |
| Valler videregående skole | Akershus, Norway | 2 | 1 | 0 | 1991-09-07 |
| Kristen videregående skole Trøndelag | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-22 |
| Byremo videregående skole | Agder, Norway | 1 | 1 | 0 | 1989-09-19 |
| Gimle videregående skole | Agder, Norway | 1 | 1 | 0 | 1990-06-26 |