Abstract: A rearview mirror apparatus for use by hunters while seated in a tree stand facing a tree trunk, includes a mirror attached to a mounting arm assembly having a spike for removably penetrating the tree trunk for selective mounting thereto and demounting therefrom in a viewing position forwardly of the tree stand seat to provide a hunter with a reflected rearward field of view from a stationary seated position facing the tree trunk. Preferably, the arm assembly includes a jointed arm portion providing at least one ball-and-socket joint by which the viewing field of the mirror may be selectively adjusted.