This is another common bird that is seen daily around the city. They are members of the crow family and are distinguished by the white/grey patch on the bill.
The Rook (Gačac in Serbian) is native to Europe and temperate Asia. They eat earth worms, insects, seeds, etc. I often see them in the rubbish dumps picking out food scraps. The specimen above I photographed in a park in New Belgrade. They have adapted to humans and they thrive in urban areas.
The bird is prominent in European folklore. It is said they can predict the weather, forecast death, and they escort souls of the virtuous dead to heaven.
The famous Russian painter Savrosov features the rook in this painting.