Wild Burros?

You can find 'Wild' Burros all around the Western Arizona area (Lake Havasu City).  These are descendants of old mining Burros that were abandoned by the miners over the last 150 years.  Many of them in areas where people frequent are tame and expect a hand out!  But, the ones you find on BLM land, far from any human structures are wild acting and will avoid you if you come too close.