Caimans are found in South America. Animals classed as Crocodilia include alligators, caimans and gavials. The caiman has a high ridge rostral to the eyes, which is the primary physical distinction between it and the alligator. There are five different caiman species on the planet, including the common and black caiman. Caimans are like alligators and we have discussed the differences between alligators and crocodiles.