Mountain Patch-nosed Snake vs. Western Patch-nosed Snake
They meet where the deserts of southern and central Arizona reach the mountains. A: The 6th upper lip scale reaches up and touches the eye in the Mountain Patch-nosed Snake; the lip scales are cut off from the eye by a row of small scales under it in the Western Patch-nosed Snake. B: One loreal scale on each side in the Mountain Patch-nosed Snake; two or more loreal scales (or one split into small pieces) in the Western Patch-nosed Snake. Rows from the owner's table. Both need a close look at the side of the head; a sharp phone photo will do.
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