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| Reporter: | Arne Geir Trædal |
| Observers: | Arne Geir Trædal |
| Site: | Breivik () |
| Date: | 2023-05-10 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Common Tern (Sterna hirundo) | |
| Phenophase: | Arrival | 10.05.2023 |
| Species: | Common Tern (Sterna hirundo) | |
| Phenophase: | Birds are singing | 10.05.2023 |