This video from Nature describes the history and uses of the dogs of Papua New Guinea. Men from the Akepangi tribe set out to hunt at dawn. They believe the dogs they take with them have supernatural abilities to track down prey. The dogs are called the singing dogs because they howl but do not bark. In the hunt, the dogs find an opossum in the canopy (upper layer of vegetation). The dogs are more valuable to the hunters than their bows and arrows. The tribe believes the dogs tell them where the evil spirits lie in the jungle.
Learn more about the Nature film "Dogs That Changed the World."