In the Cristalino area one can find a rich variety of reptiles that includes lizards of different shapes and sizes, many types of amphibians, turtles, tortoises and terrapins. The majority of these reptiles and amphibians are from the Amazon biome, but there are also many species from the Cerrado biome. Among these are the spiny-tailed lizard (Hoplocercus spinosus) and the spotted treefrog (Hyla albopunctata). Also, most of the more interesting Amazon amphibians can be found here, including the Amazon horned frog (Ceratophrys cornuta), Brazil nut frog (Dendrobates castaneoticus), rusty treefrog (Hypsiboas boans), Tukeit Hill frog (Allophryne ruthveni), white-lined leaf frog (Phyllomedusa vaillanti), cane toad (Rhinella marina) and glass frogs (Cachranella sp.).

The observation of reptiles and amphibians in the Amazon region is a challenge that requires time and patience. Reptiles commonly observed during the day include the striped forest whiptail (Kentropyx calcarata), black-spotted skink (Mabuya nigropunctata) and (Anolis punctatus). And during river trips one will quite often see large iguanas (Iguana iguana) resting on tree trunks.

The Cristalino Lodge thanks its friends and colleagues Dr. Guarino Colli, Laurie Vitt, Janalee Caldwell, Donald Shepard and Frederick Fraça for the feedback from their studies, conducted in partnership with the University of Brasilia, on reptiles and amphibians in the Cristalino Reserve.