The deer family includes elk, moose, and of course deer.  Many, if not all of these creatures shed their antlers seasonally, only to regrow them year after year.  This is especially remarkable when considering the impressive size of moose and elk antlers!  A plethora of large predators (humans sometimes included) rely on deer and their kin as a source of food.  Wolves, bears, and mountain lions, among others, will pursue herds that are sometimes quite enormous, thus keeping these grazers on the move.  This ensures the deer, elk, etc don’t overpopulate in any particulate area, a situation leading to the destruction of many plant species, ultimately causing erosion and damaging the entire ecosystem.  It is a joy to have these wonderful creatures around, but we must always respect the beautiful balance that keeps all life in check!