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| Reporter: | Birger Knudsen |
| Observers: | Birger Knudsen |
| Site: | sandvika () |
| Date: | 2011-05-07 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Arrival | 06.05.2011 |
| Reporter: | Birger Knudsen |
| Observers: | Birger Knudsen |
| Site: | sandvika () |
| Date: | 2011-05-07 |
| Aktivitet: | Spring phenology |
| Species: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Arrival | 06.05.2011 |