Localities: Nordmarka: 17.06.2018
| Reporter: | Hjalmar Larsen |
| Observers: | Hjalmar Larsen |
| Site: | Nordmarka () |
| Date: | 2018-06-17 |
| Activity: | Spring phenology |
Observation
| Species: | Common Cuckoo (Cuculus canorus) | |
| Comment: | hørte gjøken for første gang i år | |
| Phenophase: | Birds are singing | 17.06.2018 |