At Cradle Mountain–Lake St Clair National Park, common wombats are the park’s unhurried custodians. Stocky, purposeful and unfazed by passing walkers, they graze through button grass plains as if on a timetable of their own. Their cube-shaped droppings, a curious evolutionary quirk, mark territory without rolling away on sloping ground. Guests staying near Cradle Mountain often spot wombats at dusk, when the air cools and the park softens into evening. Legal protections and active mange treatment programs continue to support healthy populations here, safeguarding a species deeply tied to Tasmania’s alpine landscapes.

From June to October, the sheltered waters of the Kimberley coast become a nursery for the world’s largest humpback whale population. More than 35,000 humpbacks arrive seasonally, breaching and tails lapping in warm northern waters after long migrations from Antarctica. From the ship’s deck or a Zodiac, sightings feel wonderfully unscripted, a sudden surge of energy against red cliffs and endless blue. Once heavily hunted, these whales are now a conservation success story. Watching a calf surface beside its mother is a powerful reminder of why protected marine zones matter.

In the rainforests of Far North Queensland, the southern cassowary moves like a prehistoric secret. Tall and glossy black, with a fabulous shock of blue and red at the neck, it is both striking and elusive. Despite its imposing presence, this solitary bird mostly keeps its distance outside of breeding season, gliding silently through dense undergrowth. As vital seed dispersers, cassowaries help maintain rainforest health with every measured step. Spotting one, even briefly, feels quietly extraordinary.

The Top End’s waterways demand attention, and the world’s largest living reptiles command it. Sunbaking on riverbanks or drifting with barely a ripple, salties are masters of stealth. Once hunted to near extinction, saltwater crocodiles have bounced back under full legal protection since 1971, and their presence is now a sign of healthy waterways. On wetland cruises in Kakadu, guests learn how these apex predators anchor the ecosystem. There’s a thrill in seeing one up close, balanced by experienced guides who keep the encounter calm, safe and grounded.

Melodramatic, clever and unmistakable, sulphur-crested cockatoos bring a big burst of personality to Queensland’s coastlines and bushland. Uninterested in subtlety, their raucous calls and theatrical crest displays turn each moment into show biz. Highly intelligent and deeply social, they mate for life and adapt easily, thriving where land and sea meet. Watching them go about their day, screeching, scheming and approaching everything with unhinged enthusiasm — it’s impossible not to smile.