Alligators and crocodiles are considered fierce and are known to attack both animals and human beings. They also share some similarities in their appearance. Both the Nile crocodile and the American alligator have long tails with jagged backs. The animals have webbed feet, which coupled with the long tails makes them adept swimmers. Alligators and crocodiles are both reptiles and can exist in both salt and fresh water. However, different species have different preferences with regards to main habitats. The animals hunt both in water and on land. The Nile crocodile and the American alligator have impeccable night vision owing to the vertically slit pupils. Both Alligators and crocodiles are considered carnivorous with most of their diet consisting of small fish to large prey like buffaloes and wild boar.