Checkered Garter Snake vs. Western Terrestrial Garter Snake
Out of state their ranges meet in New Mexico and Arizona (15 one-degree squares). A: A pale crescent and black blotch behind the corner of the mouth in the Checkered Garter Snake; no crescent in the Western Terrestrial Garter Snake. B: A bold black checkerboard and a clear yellowish back stripe in the Checkered Garter Snake; dull, the back stripe narrow or faint, small dark spots in the Western Terrestrial Garter Snake.
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