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| Reporter: | Nils Neteland |
| Observers: | Nils Neteland |
| Site: | Bjerkvik () |
| Date: | 2018-04-18 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Black-headed Gull (Chroicocephalus ridibundus) | |
| Phenophase: | Arrival | 14.04.2018 |
| Species: | Black-headed Gull (Chroicocephalus ridibundus) | |
| Phenophase: | Birds are singing | 14.04.2018 |