White rhinoceros

The white rhinoceros (Ceratotherium simum) was a large terrestrial mammal native to Earth, with thick hides and a horn protruding upward from their snout.

The horn was highly prized among certain cultures of Earth as an aphrodisiac. According to USS Enterprise (NCC-1701-D) primary-school teacher Miss Kyle, "as the value of their horns increased, the number of white rhinos in the wild kept falling, until they finally became extinct" during the mid-22nd century.