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| Rapportør: | Odd arne lien |
| Observatører: | Odd arne lien |
| Site: | Bjerkestrandveien 44a () |
| Date: | 2018-05-12 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Arrival | 12.05.2018 |
| Art: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Birds are singing | 12.05.2018 |
| Art: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Nest building | 12.05.2018 |