text: Those are not antennae, LOL. Giraffes, like most Artiodactyls, have paired bony projections at the front of the head (think of deer, cows, antelopes, etc). The horns of giraffes are relatively short and covered with skin and short fur, with tufts of longer hair at the tip.  And some older individuals have a third non-paired horn that grows on the forehead.\nMale giraffes fight for dominance and females during the breeding season; they mostly hit each other with their necks, but they also use their blunt horns. \n\nPhotographs of the skull showing the bony axis of the horns:\nhttp://animaldiversity.ummz.umich.edu/site/accounts/specimens/Giraffidae.html\n\nAn image of the fight:\nhttp://www.dongettyphoto.com/kenya/giraffesfighting.html