The Eurasian hobby (Falco subbuteo), or just simply hobby
Old photo, July 2017, near the coastal forest. I saw quite large nestlings sitting on a birch. They sat next to each other and waited for the parent to bring them food. In general, there were three of them. Two were sitting upstairs, and one was somewhere nearby.
I hid in the tall grass and waited for an adult bird to arrive. After a while, their parent flew in with prey, namely dragonflies.
In the first photo you can see nestlings having dinner with these dragonflies. And on the second, an adult bird with prey.