Crocodiles, Caimans, Gharials, and Alligators

The crocodiles, caimans, gharials, and alligators -- in the crocodilia order of large reptiles of which there are 23 recorded species in three families (Crocodylidae, Alligatoridae, and Gavialidae) -- live in mostly salt or brackish water in the tropical regions of the world.  As representatives of the largest reptiles on earth and in much the same way as the "other" large four-legged reptiles--the monitor lizards--they resemble so much the dinosaurs of old with their huge sizes, their...