king snake

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various nonvenomous constricting New World snakes of the genus Lampropeltis, having a black or brown body with white, yellow, or reddish markings and feeding principally on rodents.

from The Century Dictionary.

• noun A large harmless serpent of the United States, Ophibolus getulus, and some related species, as O. sayi, of the family Colubridæ, spotted with jet-black and white or yellowish-white. It is regarded as an enemy of the rattlesnake, which it attacks and kills by constriction.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals
• noun any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals