It named here "gray crow". They are bigger as a simple black crow. 30 or 40 years ago they almost disappeared because they were afraid of people and settled far away, but then they settled down and began to live in cities and villages. These birds here quite aggressively guard their nests, and if such a crow has built a nest in the park, it attacks everyone who walks by.Awww....good person. Interesting looking bird.
Previously, these crows were predators, now they more often steal food of people and climb through the trash heaps.