We have about 20 descend on our feeders, just as they fledge. They balance on any available perch, including the washing line, just to squabble over who gets first eats! I love watching them. It all started about 4 yrs ago with one pair, and it's gone crazy since. Even the cats steer clear, as they will turn on any cat as a group....visions of Hitchcocks 'The Birds'.....! We saw a tabby, running for it's life, with about 8 battering at it's face, obviously it had caught one. Never did find out the outcome of that sad little battle.