The Birdsville Races are horse races held each year in September in the Queensland, Australia, town of Birdsville. Funds are raised in aid of the Royal Flying Doctor Service of Australia. The population is swelled from about 100 to around 7,000 people for the two-day event. As Birdsville is very remote, many travellers come by air and hundreds of aircraft fill the town's airstrip. The town of Quilpie celebrates the event by welcoming travellers who are heading westwards to Birdsville by road.