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| Reporter: | Norsk Ornitologisk Forening |
| Observers: | Magne Myklebust |
| Site: | Steinsvika, Tyrifjorden () |
| Date: | 2006-05-10 |
| Registered: | 2006-05-15 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Common Tern (Sterna hirundo) | |
| Phenophase: | Arrival | 10.05.2006 |