Middle-American-rattlesnake-1
Kingdom:Animalia
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Genus:Crotalus
Species:simus

Found from northern Mexico to Central America, it was only separated by herpetologists from the South American Tropical Rattlesnake (Crotalus durissus) in 2004. Unlike its South American relative, but in common with most other rattlesnake species, its adult venom is primarily haemotoxin, rather than neurotoxin. It stands out among other Mexican Rattlesnakes for the twin stripes running from the back of its head down a portion of its body, and its unusually rough-looking scales. Rattlesnakes were revered by the Mayans and Aztecs.