If you encounter a venomous snake in your yard, take it seriously. The snake should be removed to ensure that no one, including pets, gets hurt. Note: This does not mean the snake has to be killed. In many places, you can call animal-control or local police or fire departments to remove the snake.
Should I kill a snake in my yard?
Under no circumstances should you attempt to harm or kill a snake. Doing so simply increases your chance of being bitten and may even be illegal in your area. Removing one snake from your area does not make you any safer than removing one car from the road would make driving safer.
Is it bad to kill Copperheads?
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. The best strategy would be to use natural repellents that can help get rid of them naturally.