In Australia's defense, it gave birth to California's most famous governor, so there's that.Ostriches don't go in the hundreds swarming human land, AFAIK. Emus does.
Australia is sort of a caricature of the world. You have the ostrich parody, the angry big dogs parody (kangaroo), the rabbit animal (koalas, they eat their poop), giant spider because why not, the most lethal poisoned creature in the world for fun, and they even have a big rock in the middle of nowhere because reasons.