Great pictures!
Mind you, I doubt if you dare collide with any of them anyway, by the sheer size of some of them, you would sink your boat before they would even notice something "bothering" them !
We have loads of swans, ducks and geese on our pool normally, but they have gotten used to our boats and we can sail quite easily most times, even within their own " groups" and not cause a stir. providing we sail at a safe speed of course!