Big Bend Patch-nosed Snake vs. Black-necked Garter Snake
They meet in the valleys and foothills of southeastern and south-central Arizona. Both are striped snakes; the garter snake lives near water. A: No black blotches on the neck in the Big Bend Patch-nosed Snake; two big black blotches on the neck behind the head in the Black-necked Garter Snake. B: A big patch-like scale over the snout tip in the Big Bend Patch-nosed Snake; normal snout; a grey head in the Black-necked Garter Snake. C: Plain pale lips in the Big Bend Patch-nosed Snake; black bars on the lips in the Black-necked Garter Snake. Garter snakes have keeled scales; patch-nosed snakes have smooth, shiny scales.
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