Since yesterday there has been a change to the behavior of snakes at BC Caldera. I had snake bounty today and yesterday (two bounties). Yesterday there was no odd behavior and I even got a black snake in the first five minutes of the hunt. They were acting normally at that point.
Today there has been some kind of strange glitch where they are trying to slither in all different directions and are not able to be hit. The graphic displayed while this is going on alternates randomly between the black snake and the green one. After sometime, the snake will move along normally, but generally goes back to the same random behavior in the initial spawn location.