Tamaulipan Hook-nosed Snake vs. Mexican Hognose Snake

Both have upturned snouts and dig in loose soil in South Texas. A: Plain grey-brown, or faint thin crossbars in the Tamaulipan Hook-nosed Snake; big dark blotches down the back in the Mexican Hognose Snake. B: Smooth and shiny in the Tamaulipan Hook-nosed Snake; keeled (a ridge on each scale) in the Mexican Hognose Snake. The hognose is bigger (to 25 in), with a mostly black belly; the hook-nosed snake small (to 11 in) with a plain white belly.

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