Marine:
* Great White Shark: The apex predator of the ocean, the Great White Shark is a formidable hunter with powerful jaws and keen senses.
* Saltwater Crocodile: Found in northern Australia, these massive reptiles are opportunistic hunters with powerful jaws and a reputation for being aggressive.
* Orcas (Killer Whales): While not as common as Great Whites, Orcas are known to hunt large sharks, seals, and other marine animals.
Terrestrial:
* Dingo: The native wild dog of Australia, dingoes are apex predators in many ecosystems. They are highly adaptable hunters and play an important role in regulating prey populations.
* Red-tailed Black Cockatoo: While technically not a predator in the traditional sense, these large parrots are known to prey on small mammals and reptiles, making them one of the few avian predators in the country.
* Tiger Quoll: A nocturnal marsupial predator, tiger quolls are known for their agility and powerful bite. They are an important predator of small mammals and reptiles.
* Goanna (Monitor Lizard): Various species of goannas are found throughout Australia, and some, like the Perentie, are large and powerful enough to hunt small mammals and even snakes.
Other notable predators:
* Python: Various species of pythons are found in Australia, with some reaching impressive sizes and capable of consuming large prey.
* Brown Snake: This highly venomous snake is a fearsome predator and responsible for a significant number of snakebite incidents.
* Saltwater Crocodile: While typically associated with the marine environment, saltwater crocodiles are known to wander into freshwater areas and can pose a threat to land animals.
It's important to remember that the top predator in any given ecosystem can change depending on factors like prey availability and environmental conditions.