Mexican Garter Snake vs. Western Ribbon Snake

Out-of-state look-alike: both have the side stripe on scale rows 3 and 4; they meet in Texas and northern Mexico. A: Dark bars on the seams of the upper lip scales in the Mexican Garter Snake; plain white lips, no dark bars in the Western Ribbon Snake. B: Medium build; the tail about a quarter of the length in the Mexican Garter Snake; very slender; the tail about a third of the length in the Western Ribbon Snake.

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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