Two to four short, skin covered horns are present in both sexes and there is a central swelling, between the eyes, which in northern giraffes is almost as long as the horns.

An adult male's ossicones usually have the hair rubbes off the top. This is because the males use their horns in ritualized combat and sometimes in serious fights.***Family Life

Females and young giraffes have tufts of hair at the tops of their horns. page2