yacare caiman

That toothy grin might make you think this is a crocodile or an alligator. But the Yacaré caiman is neither. Caimans are closely related to alligators, but you won't run into one in a Louisiana swamp. Caimans live in South America. All six types of caiman are protected, which means that they may disappear from the planet forever unless we help them.

Image credits: main image, courtesy of Santos Breyer, the Crocodilian Photo Gallery; George Amato: courtesy of Denis Finnin.