The boas are 'skinny' snakes. They prey on rodents. The common rattle snake is far more dangerous.
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The sand vipers in Iraq were not "that" poisonous. When I first got there I was staying in temporary quarters and found out after the fact that a sand viper was right under my bed- by my head. One day I went in and saw a little snake that appeared scared shitless next to my bed, and I looked around and saw the much bigger sand viper. I got the woman in charge of the office I was taking over for (I was advanced party) and showed her. She freaked out. I got the sand viper away from the little snake so it could get away. I have no idea what he was - he could have been venomous too. But it all worked out- and the lady I was relieving thought that I was nuts. Apparently there was a hole in the trailer at the head of my bed where the snakes came and went from. We put in a work order to get that fixed.
This guy is nuts. Ive watched many of his videos. He treats his snakes like they are puppies. He lets Elvis loose in his house.
https://youtu.be/QtkM70AX2Ks