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| Reporter: | Birger Knudsen |
| Site: | festningsdammen () |
| Date: | 2010-04-17 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Black-headed Gull (Chroicocephalus ridibundus) | |
| Phenophase: | Arrival | 17.04.2010 |
| Reporter: | Birger Knudsen |
| Site: | festningsdammen () |
| Date: | 2010-04-17 |
| Aktivitet: | Spring phenology |
| Species: | Black-headed Gull (Chroicocephalus ridibundus) | |
| Phenophase: | Arrival | 17.04.2010 |