I love the first picture just imagine if you were a rodent in the wild and that boa was in the shadows like that waiting for you to get real close..You'd be a goner no time. its crazy how quiet snakes can be even on the loudest leaves and branches and so on especially at their sizes when they are big at like 5ft and so on...

thats why i love snakes they are great predators to say the least.
Adding on to the fact they dont have legs or arms