Localities: Tjennane: 30.05.1995
| Reporter: | Porsgrunn videregående skole |
| Site: | Tjennane () |
| Date: | 1995-05-30 |
| Activity: | VANDA: Bunndyr |
Observation
| Species: | Gerris lacustris |
| Number: | 8 |
| Original: | Ja |
| Species: | Pulmonata |
| Number: | 4 |
| Species: | Gyraulus acronicus |
| Number: | 2 |
| Species: | Agrypnia obsoleta |
| Number: | 1 |
| Species: | Limnephilus rhombicus |
| Number: | 6 |