The Philadelphia Zoo has two common zebras. They are half-sisters named Laura and Susie. I am not sure which sibling this is. However, those flared nostrils give her a diva profile. These two mares can expect to live 15 to 16 years or more. This species from the African plains are characterized by stripes across the stomach. Interestingly, a zebra’s natural color is black. The white stripes emerge from the lack of pigmentation.