Threskiornis molucca, commonly known as the Australian white ibis, is native to Australia and nearby regions, including parts of Indonesia, New Guinea, and surrounding islands. It is predominantly found in eastern, northern, and southwestern Australia.

The Australian white ibis typically inhabits wetlands, swamps, lagoons, mudflats, and grasslands. They are often found in coastal and estuarine environments but can also adapt to urban areas such as parks and golf courses due to the availability of food.

As a wading bird, the Australian white ibis plays a role in the ecosystem by feeding on aquatic invertebrates, small fish, and other available food sources in wetland environments. They are also opportunistic feeders in urban settings, where they scavenge for food waste. Their adaptation to both natural and urban settings highlights their flexible ecological niche, allowing them to exploit diverse food resources.