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| Rapportør: | Lars Bleken |
| Observatører: | Lars Bleken |
| Site: | Gullerudvika () |
| Date: | 2011-04-10 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Grey Heron (Ardea cinerea) | |
| Phenophase: | Arrival | 10.04.2011 |
| Art: | Mute Swan (Cygnus olor) | |
| Phenophase: | Arrival | 08.04.2011 |
| Art: | White Wagtail (Motacilla alba) | |
| Phenophase: | Arrival | 10.04.2011 |