Birds are very interesting animals, since we know so little about them, but this bird seems like an ordinary
Scandinavian crow, that a lot of people mean there are too many of, so you are paid for shooting them.
The bird is very intelligent and it can be trained to speak if you catch it as a child. May be it is too agressive for your smaller black crows.
Related thread by you:
WhiteCourt Hooded Crow is back for the 2006 Nesting season.
Birds move like
the Canadian Goose that has invaded Scandinavia. It is very aggressive compared to our ducks and geese. Some experts will have it removed. It is competition about food in the winter that is the critical factor.
Back on topic, how are your desktop search engine compared to
Google desktop search?