* Dingoes: These wild dogs are the main predator of koalas, especially in areas where they overlap.
* Wild cats: Introduced feral cats and foxes pose a threat to koalas, particularly young ones.
* Birds of prey: Some large birds like eagles and owls can prey on koalas, especially when they are on the ground.
* Humans: While not directly a predator, humans can pose a threat through habitat loss, car accidents, and disease.
Why koalas might seem "unpredatable":
* Their lifestyle: Koalas spend most of their time high in eucalyptus trees, making them harder for ground predators to reach.
* Their camouflage: Their furry grey coats blend well with the bark of the trees, making them difficult to spot.
* Their defense: They have sharp claws and teeth, and can bite if threatened.
The takeaway: Koalas are not invulnerable, but their lifestyle and defenses help them stay relatively safe from most predators. However, threats from human activity and introduced animals continue to put their survival at risk.