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| Rapportør: | Hjalmar Larsen |
| Observatører: | Hjalmar Larsen |
| Site: | Nordmarka () |
| Date: | 2023-06-01 |
| Aktivitet: | Spring phenology |
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| Art: | Common Cuckoo (Cuculus canorus) | |
| Phenophase: | Birds are singing | 01.06.2023 |
| Rapportør: | Hjalmar Larsen |
| Observatører: | Hjalmar Larsen |
| Site: | Nordmarka () |
| Date: | 2023-06-01 |
| Aktivitet: | Spring phenology |
| Art: | Common Cuckoo (Cuculus canorus) | |
| Phenophase: | Birds are singing | 01.06.2023 |