(paraphrasing--I'll go look up exact words later) that until man begins to give respect to God's creatures that the enmity between man and beast would not end.
Still, any poisonous snake in my yard would find a quick death because of the danger they could strike a child/grandchild. In West Virginia, where we lived 8 years, we only killed one copperhead that was up by the house. My 14 year old killed it while I was at work. We had dozens of black and garter snakes around consistently that we never harmed.