Quote: Kava: The aboriginal with a sling is a new one for me. I'm sure there must be some story behind that one.
yes, blame the Macassans.
Quote: but white settlers would have used horses and dogs to round up sheep and cattle.
I would have to agree with this.
Quote: After these camel trains became redundant the camels were turned loose. As a result Australia has the largest (not sure if the only) herds of wild camels in the world.
Many of the camels you see in the Middle East are Australian camels, they are imported because they are disease free..