These ancient beasts inhabit lakes, rivers, and open sea areas of Tropical North Queensland, but they prefer the brackish water of river mouths near the coast. Murky water is a hotspot for crocs, and they tend to hang out near the waterline so they can ambush prey.

In the Cairns region of Tropical North Queensland, salt-water crocodiles (salties) are most concentrated in the mangrove-lined estuaries and river systems that flow into the Coral Sea. Specifically, the Daintree River, located about 90 minutes north of Cairns, is famous for its high density of crocodiles, with many tour operators offering specialized cruises to spot them in the wild. Closer to the city, Trinity Inlet is another major habitat where large crocodiles are frequently sighted near the mudflats and deep water channels. For those who want a guaranteed sighting in a safe environment, Hartley’s Crocodile Adventures is the premier destination between Cairns and Port Douglas, where crocodiles are kept in a semi-natural lagoon for educational displays. It is vital for visitors to remember that "Croc Country" signs at local beaches and swimming holes should be taken very seriously; even if you cannot see them, they are often present in the murky waters of the creeks and even along the coastline during certain times of the year.