Crocodiles & Alligators
Crocodiles and alligators, along with caiman and gharials, are part of a group of reptiles known as crocodilians. There are 23 species of crocodilians found in over 90 countries around the world. Crocodilians are the most evolutionary advanced of all the reptiles. They are more closely related to birds than other reptiles. Crocodilians have a much more complex heart structure than other reptiles. One way to tell the difference between crocodiles and alligators is to look at their snouts. An alligator has a round, U-shaped snout and crocodiles have narrow, V-shaped snouts.