Today ostriches can only be found in South and Central Africa, with a modest amount in Australia. Ostriches prefer flat land and hot spots which are lacking rain. They are rampant in Northern Africa and South Africa. The ostrich, however, is not native to Australia. They are often mistaken for other flightless birds.
The two sizeable flightless birds which are found in Australia are the emu and the cassowary. Both of these are rarities, much like the ostrich, but they are a different species entirely. There have also been several feral populations of ostriches in Australia, over the last hundred years.
No, this is not true. The only ratite that looks very similar to ostriches is emus. Emus are native to Australia just as how ostriches are native to Africa. Emus are the largest native birds in Australia, and they are the second-biggest birds when you consider their height. Ostriches are found mostly in Africa. They live mostly in the desert and in the Savannah region of Africa. The fact that they are birds does not mean they can fly, and that's why they are often described as flightless birds.
They have wings but not for the usual function; they use their wings for protection and balancing. Ostriches can't fly, but they can run; in fact, they are the world's fastest ground birds. They are able to get this status because of their powerful and long legs. They run at their highest speed when they are being threatened by predators. And at times, they don't need to run because they can defend themselves with their powerful two legs.