Their fur has a light yellowish tan or off-white colour with brown or russet patches. No two giraffes have the same pattern. The different sub-species have different coat patterns. Both male and female giraffes have small horn-like stumps on their head, which are covered with skin. The horns are called ossicones. These come from the cartilage displaced from their skull as it develops. These are fur-covered bumps on their skulls, unlike the horns of other animals.