Lets face it, crocodiles, alligators - they both look the same. Beady eyes, scary teeth and loads of warty skin - what else do you need to know? Well, they must be different otherwise they wouldn't have different names, and with just a closer look - and a little help from a suitable expert - you can see for yourself just how different they truly are.
The first difference between a crocodile and an alligator is that they are from different families. While both are grouped within the crocodilian family, crocodiles are from the crocodylidae family, while alligators and caiman are from the alligatoridae family.
In terms of physical differences, the easiest way to tell the difference between the two is that a crocodile has a very long, narrow, V-shaped snout. In contrast, the alligator's snout is wider and U-shaped. Because of the wide snout of the alligator it packs more crushing power to eat prey like turtles that constitute part of its diet. The narrow crocodile snout, although still very powerful, is not really suited for prey like turtles but is very versatile for fish and mammals.
An alligator, on the other hand, has a wider upper jaw, so when its mouth is closed the teeth in the lower jaw fit into sockets of the upper jaw, hidden from view. Only the teeth of the upper jaw are exposed along the lower jaw line. Even the enormous 4th tooth on the bottom jaw, which is exposed in a crocodile, is hidden in the alligator.
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Based on an article by http://www.wisegeek.com/what-is-the-difference-between-a-crocodile-and-an-alligator.htm
Photo care of http://www.wisegeek.com/what-is-the-difference-between-a-crocodile-and-an-alligator.htm and http://www.boredkillers.com/difference-between-alligator-and-crocodile/ and http://animals.howstuffworks.com/reptiles/alligator-pictures.htm
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