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| Rapportør: | Anita Vold |
| Observatører: | Anita Vold |
| Site: | Billebakken Terrasse 32 () |
| Date: | 2011-04-02 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Chaffinch (Fringilla coelebs) | |
| Phenophase: | Arrival | 02.04.2011 |
| Art: | House Sparrow (Passer domesticus) | |
| Phenophase: | Arrival | 02.04.2011 |
| Art: | Eurasian Siskin (Spinus spinus) | |
| Phenophase: | Arrival | 02.04.2011 |