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网址:http://crocs.org/
标题:crocs.org - information on crocs (crocodiles) from wiki
关键字:crocs pictures of crocs crocodiles information on crocs reptiles
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Crocs.org domain name. Crocs is a common abbreviation for crocodiles For any communications regarding this site or domain name e-mail: crocs-info at crocs.org The following information on crocs is from Wikipedia, the free encyclopediaJump to: navigation, searchFor other uses, see Crocodile (disambiguation).CrocodilesFossil range: Late Cretaceous - RecentNile CrocodileScientific classificationKingdom:AnimaliaPhylum:ChordataClass:SauropsidaOrder:CrocodiliaFamily:CrocodylidaeCuvier, 1807GeneraMecistopsCrocodylusOsteolaemusSee full taxonomy.A crocodile is any species belonging to the family Crocodylidae (sometimes classified instead as the subfamily Crocodylinae). The term can also be used more loosely to include all members of the order Crocodilia: i.e. the true crocodiles, the alligators and caimans (family Alligatoridae) and the gharials (family Gavialidae), or even the Crocodylomorpha which includes prehistoric crocodile relatives and ancestors. Crocodiles are large aquatic reptiles that live throughout the Tropics in Africa, Asia, the Americas and Australia. Crocodiles tend to congregate in freshwater habitats like rivers, lakes, wetlands and sometimes in brackish water. They mostly feed on vertebrates like fish, reptiles, and mammals, sometimes with invertebrates like mollusks and crustaceans, depending on species. They are an ancient lineage, and are believed to have changed little since the time of the dinosaurs.Contents[hide]1 Description1.1 Age1.2 Size1.3 Etymology2 Biology and behaviour2.1 Danger to humans3 Taxonomy of the Crocodylidae4 Differentiation from alligators5 Crocodile products6 See also7 References8 Further reading9 External links//   if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); }   //DescriptionCrocodiles, like dinosaurs, have the abdominal ribs modified into gastraliaCrocodiles are among the more biologically complex reptiles despite  their prehistoric look. Unlike other reptiles they have a  four-chambered heart, diaphragm and cerebral cortex.  Their external morphology on the other hand is a sign of their aquatic  and predatory lifestyle. A crocodile’s physical traits allow it to be a  successful predator.  They have a streamlined body that enables them to swim faster. They  also tuck their feet to their sides while swimming, which makes the  animal even faster, by decreasing the water resistance. They have  webbed feet which, although not used to propel the animal through the  water, allow it to make fast turns and sudden moves in the water or  initiate swimming. Webbed feet are an advantage in shallower water  where the animals sometimes move around by walking.Crocodiles are very fast over short distances, even out of water.  They have extremely powerful jaws capable of biting down with immense  force, by far the strongest bite of any animal. The crocodile's bite  force is more than 5,000 pounds per square inch[1], comparing to just 335 psi for a