Raving Ravens?

During the last several weeks there has been a flock of over 100 Forest Ravens along the dunes of the South Arm Neck. While I'm used to seeing flocks of ravens during the Winter months, particularly around tips and ploughed paddocks, I can't recall a flock of this size during Summer. They seem to be having a great time cavorting in the updraughts created by the dunes. I did wonder whether this was a speed dating group!