Alligator vs crocodile
You can easily identify these 2 by the shape of their snouts: crocodiles have prominent, elongated V-shaped faces while alligators have shorter, wider U-shaped ones. Also, consider the teeth: crocodiles display their trademark toothy “grin” with every fourth tooth visible. Conversely, the alligator’s upper jaw is broader than the lower one, so its teeth aren’t visible for the most part.