The answer to the question about what a male giraffe is called is a cow. Female giraffes or cows are shorter and lighter than male giraffes (bulls). A cow can weigh up to 1,400 pounds and can grow as tall as 18 feet while a bull can weigh up to 4,200 pounds and can grow as tall as 20 feet.
Female giraffes tend to associate themselves in a group with a dozen or so female giraffes and they only occasionally include a few younger bulls in their groups while a male giraffe tend to live with older male giraffes which are leading a solitary life. Although there are many differences, a male and female giraffe both have long necks, they both mate rapidly and they both have ossicones on their head.