Salem

So if you want to try and stomp a rattler to death by hiding behind a stream, be sure the stream doesn't end anywhere soon.
I just tried it, not that i can't one shot them but just to try it, and the sneaky bastard immediately crawled to the end of the stream and came right at me.
So, be warned!

Animal AI has been overhauled some time ago

This is why you stand in the water, not on the other side.