Northern Cat-eyed Snake vs. Chihuahuan Nightsnake

Both are blotched night snakes with cat-like pupils; they meet in the brush of South Texas. A: Fewer, big dark saddles that reach down the sides in the Northern Cat-eyed Snake; many small dark blotches, and a dark collar on the neck in the Chihuahuan Nightsnake. B: Big, bulging eyes; the head much wider than the neck in the Northern Cat-eyed Snake; flat, barely wider than the neck in the Chihuahuan Nightsnake. The Northern Cat-eyed Snake is yellow to tan and climbs into shrubs to hunt frogs; the nightsnake is grey to tan.

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

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