I did not realize until today ostriches aren't native to Australia. As a clueless USian all I knew was Australia has ostriches and Australia once had something called the "emu war". This name makes it sound like emus were an invasive species. No. Ostriches are native to Africa, Rheas to South America, Emus to Australia. Ostriches in AUS are an invasive species introduced by colonizers. The "emu war" was because the colonizers didn't like the native emus eating their crops