gemsboks in the kalahari desert

africa african aggression aggressive alert animal antelope behavior behaviour black buck bush combat competition conservation deer desert dune dust ecology fauna fight game gazella gazelle gemsbok grazer herbivore horn horned horns kalahari kgalagadi male mammal mammals muzzle natural nature neck oryx outdoor park reserve safari sand sky south southafrica southern standing stare territorial territory ungulate unspoiled watchful wild wilderness wildlife