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 evolutionarily advanced of all the reptiles. They are more closely related to birds than other reptiles.
One way to tell the difference between crocodiles and alligators is to look at their snouts: Alligators have round, U-shaped snouts, while crocodiles have narrow, V-shaped snouts.