What is a deep pond or watering hole called in Australia?

A deep pond or watering hole in Australia is called a billabong. Billabongs are common in the outback and are often the only source of water for miles around. They are usually found along river systems and are formed when a river changes course or floods and leaves behind a pool of water. Billabongs can be permanent or temporary and can range in size from small ponds to large lakes. They are often surrounded by vegetation and provide habitat for a variety of animals, including birds, reptiles, and fish.