National Geographic : 2009 Nov
Alligator/Caiman Crocodile Gharial Endangered species, population 5,000 or fewer Ranges of Crocodilian Families Population 1,000,000 500,000 250,000 75,000 0mi 2,000 0km SCALE AT EQUATOR 2,000 South Florida is the northern limit of the American crocodile. BROAD-SNOUTED CAIMAN YACARÉ CAIMAN AMERICAN ALLIGATOR SPECTACLED CAIMAN CUVIER'S DWARF CAIMAN BLACK CAIMAN SMOOTH-FRONTED CAIMAN AMERICAN CROCODILE SLENDER-SNOUTED CROCODILE AUSTRALIAN FRESHWATER CROCODILE MORELET'S CROCODILE NILE CROCODILE NEW GUINEA CROCODILE MUGGER ESTUARINE CROCODILE AFRICAN DWARF CROCODILE CHINESE ALLIGATOR CUBAN CROCODILE INDIAN GHARIAL TOMISTOMA SIAMESE CROCODILE ORINOCO CROCODILE PHILIPPINE CROCODILE Southernmost fossil evidence Northernmost fossil evidence ARCTIC CIRCLE EQUATOR INDIA UNITED STATES NORTH AMERICA SOUTH AMERICA AFRICA EUROPE ASIA AUSTRALIA CROC WORLD Living crocodilians, which include two species of alligators, six kinds of caimans, 14 types of crocodiles, and the lone species of gharial, all reside within 2,600 miles of the Equator, though their ancestors ranged nearly from Pole to Pole. Some species, such as the American alligator and Nile crocodile, are thriving, but many others are declining as humans expand into croc habitat. Some, such as the African dwarf crocodile (above), are hunted for their meat. A few species, notably the gharial, may go extinct within a decade in the wild.