Thanks to the large amount of water within the Reserve, several reptiles such as the caiman and the anaconda can be observed.
Where the bodies of water are rich in lizards, black alligator and sicurices or anacondas, there are also several species of poisonous vipers.
Where the latter require their due respect, it is necessary to highlight that the most of the vipers are not poisonous, and that without provocation most species are not aggressive.