Birds and crocodiles are very different. The bodies of crocodile are covered with scales but the bodies of birds are covered with feathers. Most of birds can fly but crocodiles can't. Crocodiles crawl on the earth, also they swim. Some birds can swim and dive too. Crocodiles are predators, they are dangerous even for people, they have sharp teeth. Most of birds are smaller than crocodiles. They are weak, many of them eat plant food.
