Snakes appear in Maya art and religious roles more than any other animal. The Serpent's Den is home to venomous snakes – Neotropical rattlesnakes, colorful Eyelash palm vipers and the feared Fer-de-lance. Non-venomous snakes such as Honduran milksnakes and Red-tailed boas are also exhibited.
 
In addition to Helmeted basilisks, Conehead and Blue spiny lizards, the Mexican beaded lizard, one of only two venomous lizards (the other being the Gila monster) is displayed.
 
The Red-eared slider turtle swims throughout his multi-species exhibit. The Morelet's crocodile, as with other species of crocodiles, were both feared and revered by the Maya. When floating on water, the body of the crocodile represents the earth, above is the upperworld and below is the underworld.
 
Red-eyed, Mexican and Hourglass tree frogs live throughout the lower level of Mundo Maya. The Marine toad produces a powerful hallucinogen through glands at the back of its head.
 
The Axolotl (also known as the Mexican walking fish) is an unusual amphibian in that it spends its entire life in the water, in larval stage.
 
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