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| Reporter: | Bogstad skole |
| Observers: | cathrine og erle |
| Site: | Lysakerelven () |
| Date: | 2015-06-15 |
| Aktivitet: | Fremmede arter |
Funn
| Species: | Spanish Slug (Arion vulgaris) |
| Species: | Hagelupin (Lupinus polyphyllus) |
| Species: | Canada Goose (Branta canadensis) |
| Species: | Mink (Neovison vison) |
| Species: | Russekål (Bunias orientalis) |
| Species: | Roman Snail (Helix pomatia) |