Crocodile biology and ecology
Australia is home to two species of crocodiles, both occurring in Queensland.
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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Features of estuarine 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.
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Features of freshwater crocodiles
Learn more about Queensland’s estuarine and freshwater crocodiles.
Heading to Tropical North Qld this winter?
Be Crocwise in Croc Country.
Learn more about how to stay safe around the water and reduce your risk.
Snappy facts: everything you wanted to know about crocodiles in Queensland
Learn some interesting crocodile facts as we unpack the secret life of these ancient reptiles. Visit and subscribe to our Down to Earth blog.