Great spotted Cuckoo
It’s always a great enjoy to meet with Clamator glandarius (Κισσόκουκοι).
It’s not so easy, as they arrive end of March, they mate and then search for limited days for convenient places to leave their eggs (usually Magpies nests) as they are parasitic.
Finally if we are lucky we can observe several days later (end of May ?) the young ones in the same area.