Sight hounds, such as the Greyhound, are built for speed and hunt by sight. Historically they used to kill their prey. Sight hounds are among the earliest known dog breeds known to man and the type from which many of our modern breeds descend. The now extinct Kangaroo Dog and Australia's wild dog, the Dingo are also included in this section. Although not recognised as pure breeds, they deserve to be included among the Sight Hounds on this Australian website.