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Kangaroos have no prey, being herbiviorous, but they also have few predators. The main predator, the Thylacine (or Tasmanian Tiger), is now extinct, but some of the kangaroo's other predators are dingos and, in some circumstances, wedge-tailed eagles and even goannas.

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 Kangaroos are herbivores they don't hunt, therefore have no prey.

Rodent prey of the barn owl (Tyto alba) partly reflects the availability of prey species of small mammals. However, small- to moderate-sized mice of the genera Sigmodon (cotton rats), Oryzomys (rice rats) and Microtus (voles) are selectively preyed upon when available, and species of Dipodomys (kangaroo rats) are often underrepresented prey items. The range of T. alba in north Texas overlaps the restricted range of the little-studied Texas kangaroo rat (D. elator). Examination of regurgitated barn owl pellets provides the first documentation of predation on this distinctive rodent. However, given the ready availability of this kangaroo rat, its representation as a prey species of the barn owl is lower than expected, even given the usually poor representation of other Dipodomys species from other localities. Selective predation on favored prey and presence of other buffer species are certainly contributory factors to the low incidence of kangaroo rats in owl pellets. Some predator avoidance mechanism(s) of Dipodomys, perhaps especially well developed in D. elator, might also be implicated.