ringneck snake

or ring-necked snake

noun
  1. any of several small, nonvenomous North American snakes of the genus Diadophis, usually having a conspicuous yellow or orange ring around the neck.

Origin of ringneck snake

First recorded in 1825–35
Also called ring snake.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018