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Crocodiles

Crocodiles have evolved for over 200 million years and outlived dinosaurs, with 23 species inhabiting over 90 countries across freshwater habitats. They separate into three families and exhibit a range of calls, swimming and feeding on frogs, fish and turtles while some ingest rocks to help float. Their aquatic nature may have helped crocodiles survive the asteroid impact that caused dinosaur extinction.

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HeRoe Soesilow
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27 views1 page

Crocodiles

Crocodiles have evolved for over 200 million years and outlived dinosaurs, with 23 species inhabiting over 90 countries across freshwater habitats. They separate into three families and exhibit a range of calls, swimming and feeding on frogs, fish and turtles while some ingest rocks to help float. Their aquatic nature may have helped crocodiles survive the asteroid impact that caused dinosaur extinction.

Uploaded by

HeRoe Soesilow
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Crocodiles are built to last.

Evolving around 200 million years in the


Mesozoic epoch, crocodiles have far outlived the dinosaurs. Scattered
across more than 90 countries, 23 species of the Crocodylia order
haunt freshwater rivers, streams and marshes. Those 23 crocodilian
separate into three families: alligatoridae (alligators and caimans),
crocodylidae (crocodiles) and gavialidae (gharials).
Voluble crocodiles exhibit a range of calls signaling anything from
courtship to distress [source: Florida Museum of Natural History]. They
swim through their habitats chomping on frogs, fish, turtles and other
vertebrates. To help them float, many crocodiles will ingest rocks to
weigh down their centers of gravity [source: Burton and Burton].
Evolutionary biologists suspect that crocodiles' aquatic nature may have
helped them survive the theoretical asteroid impact that led to the
extinction of dinosaurs.

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