|Nature and Wildlife by Dr. Alan Harley
The mountain lion occurs only in the western hemisphere and has one of the most extensive ranges of any land mammal, from the Straights of Magellan in South America to the Canadian Yukon. The major reduction in mountain lion distribution has come as a result of its extirpation from areas of historic range in the eastern United States and Canada.
In Arizona, mountain lions are absent only from the areas heavily impacted by human development. In general, the distribution of mountain lions in Arizona corresponds with the distribution of its major prey species, deer.