The white rhinoceros (Ceratotherium simum) was a large terrestrial mammal, a type of rhinoceros, native to Earth, with thick hides and a horn protruding upward from their snout.
According to USS Enterprise-D primary school teacher Ms. 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. (TNG: "New Ground")
A stuffed white rhinoceros was found among the collection held in the menagerie previously owned by noted Zibalian collector, Kerner Hauze. (LD: "Kayshon, His Eyes Open")