While touring along the David Thompson Highway Just east of Banff National Park, Kootenay Plains, Alberta, Canada I came across this scene. A Grizzly Bear chasing a Black bear up a tree.
I stayed there and photographed them for approxamently three and a half hours. As it turned out the Grizzly had killed the Black Bears cub and was eating it.
Not realy a pleasent thing to watch but that is nature.