Answer:
Dingoes hunt some of the smaller kangaroos. Man is a greater danger to the kangaroo than dingoes are. They used to have another similar-sized predator, the Thylacine (also known as the Tasmanian tiger), but they are now extinct from the mainland and probably from the island of Tasmania.
As larger kangaroos are herbivores they don't hunt, therefore have no prey. Smaller species of kangaroos such as musky rat-kangaroos prey on small invertebrates such as earthworms and grasshoppers.