Have a look at the European Rook. They live in colonies, all year round. (Rare for Corvids, because they're nest robbers) Sometimes they have a "Parliament", where they all sit around in an inward facing circle. With one Rook in the middle. This usually happens in the middle of a field. Hours they sit, sometimes. Sometimes, one of them will Caw, or Click, but apart from that, they are quiet. Eventually, they will either allow the Rook in the middle to leave, or suddenly all start to peck him to death. If the latter is the case, the Rook in the middle doesn't make any attempt to escape. It's my opinion that they are Trying one of their own who may have been Nest robbing. It's the only Crime in Rook society, and one that cannot be tolerated in a community.
Do you find that creepy, or encouraging?