The dingo (Canis lupus dingo) is a free-ranging dog found mainly in Australia. Its exact ancestry is debated, but dingoes are generally believed to be descended from semi-domesticated dogs from East or South Asia, which returned to a wild lifestyle when introduced to Australia. As such, it is currently classified as a subspecies of the grey wolf, Canis lupus. The Australian name has therefore sometimes been applied to similar dogs in Southeast Asia or America believed to be close relatives.