The island known for its unique wildlife and ecosystem is Australia. This continent-island features diverse habitats, including rainforests, deserts, and reefs. Australia is famed for its endemic species such as the platypus, kangaroo, and koala. The Great Barrier Reef, a UNESCO World Heritage site, is a significant ecological treasure that supports vast marine life. Australia's isolation has led to an exceptional range of flora and fauna not found anywhere else in the world.