Gemsbok Oryx gazella mammal animal animals Bovidae Antelopes GEMS ORYGAZ adult Grassland Steppe desert East Africa Standing Herbivore rare threatened Sossusvlei Namibia October sand dune evening sunset Gemsbuck antelope savannah big antler horn horns landscape dust sun sunny sky elegant sunrise red Oryx-Antelope arid beautiful black kalahari orange travel safari game reserve wild wilderness wildlife lonely alone wandering walking view horizon mountains hill impressive buck meadow pasture grassland