@tsarstepan,
I found the whole thing so funny. It has been going on for a while - I haven't read everything up on it - but I wonder how far they can swim and if it is something snakes do regularly or what causes them to swim.
I would love to see what happens when there is a slew of rattlers all swimming for the mainland - slithering up the beach and instead of everyone running out for fear of sharks it is all these rattlers would make a great movie (now I know this is a lake and not the ocean but still fun).