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| Reporter: | Egil Bruvold |
| Observers: | Egil Bruvold |
| Site: | Grorud () |
| Date: | 2012-05-22 |
| Aktivitet: | Spring phenology |
Funn
| Species: | House Martin (Delichon urbicum) | |
| Phenophase: | Arrival | 20.05.2012 |
| Comments: | annkomst |
| Species: | Common Swift (Apus apus) | |
| Phenophase: | Arrival | 22.05.2012 |
| Comments: | annkomst |