Localities: Korssjøen: 12.09.1990
| Reporter: | Holmestrand videregående skole |
| Site: | Korssjøen () |
| Date: | 1990-09-12 |
| Activity: | VANDA: Bunndyr |
Observation
| Species: | Ephemera vulgata |
| Number: | 19 |
| Original: | Ja |
| Species: | Lymnaea peregra |
| Number: | 1 |
| Original: | Ja |
| Species: | Caenis horaria |
| Number: | 64 |
| Original: | Ja |
| Species: | Centroptilum luteolum |
| Number: | 2 |
| Original: | Ja |
| Species: | Cyrnus flavidus |
| Number: | 2 |
| Original: | Ja |
| Species: | Leptophlebia vespertina |
| Number: | 49 |
| Original: | Ja |
| Species: | Molanna angustata |
| Number: | 4 |
| Original: | Ja |
| Species: | Sialis lutaria |
| Number: | 3 |
| Original: | Ja |