Crocodile biology and ecology

Australia is home to two species of crocodiles, both occurring in Queensland.

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Estuarine crocodiles

The estuarine or saltwater crocodile (Crocodylus porosus) is the larger of the two, growing to over 4 metres in length. Estuarine crocodiles can pose a danger to humans, which is why it’s important to Be Crocwise in Croc Country.

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Freshwater crocodiles

The freshwater crocodile (Crocodylus johnsoni) is smaller and more timid. While they can inflict injury on humans if provoked, they have never been implicated in a human fatality.

Learn more about Queensland’s estuarine and freshwater crocodiles.