The northern water snake is harmless to man, but it is often killed by fishermen and others who believe it to be dangerous. In the state this species is found primarily in the Piedmont and in the mountains at an elevation up to 3,500 feet. Its favorite habitats are streams, rivers, lakes, and farm ponds. The water snake, a beneficial predator, prefers amphibians and fishes for food. It is of prime importance in controlling fish populations and preventing small specimens from completely taking over a water area.