Although copperheads are not an endangered species you should never try to kill a copperhead snake (or any other snake) for that matter. In some states killing them can even be illegal.

Should I kill a copperhead snake?

If you encounter a snake, we highly advise you not to try to kill it as you may risk getting bitten. ... If you have found a Copperhead Snake in your yard and garden, then it is safe to assume that there is a food source nearby, which is exactly why the snake is so comfortable on your property.

Are Copperheads good for anything?

Mitchell, author of "The Reptiles of Virginia," offered another reason to let copperheads live: "They are great rodent eaters. They play a major role in controlling rodent populations."