Zebra

A zebra was a type of animal native to Earth, an herbivorous mammal.

"Zebra" was also used as phonetic spelling for the English letter Z. It was reflected in designations such as Alpha Zebra Outpost, Lab Delta Zebra, Watch Station Zebra and Zebra sector.

History and specifics
Zebras are white with black stripes. 

In 1986, the San Diego Zoo used zebras in their marketing material. 

In the 2260s, an epidemic on Earth was fatal to zebras and several other wildlife species. In 2267, the USS Enterprise (NCC-1701) was assigned to retrieve some zebras from other planets in order to repopulate them on Earth. The crew also brought back members of bear, camel, chimpanzee, hippopotamus, kangaroo, leopard, parrot, platypus, rhinoceros, tiger, and turtle species. 

Expressions

 * "A smart tiger stalks the weak zebra first."
 * "When you hear hoofbeats, think horses, not zebras."

Species with similar strips

 * Mixed race Orions were rare but had skin patterns which looked like zebra or tiger stripes, in the colors of their parents' skin tones.
 * The Dedderac have zebra-like stripes. (, SS DS9 (Old Souls))
 * Chiar have varying outer skins. In 2377, had patterns which reminded Captain Kathryn Janeway of a zebra.