Cliff Racers are large flying creatures found throughout Morrowind, and are related to Cliff Striders and Cliff Darters. They are very aggressive and will attack anyone in sight. Cliff Racers have good vision range, and will often detect and follow travelers without being noticed. This can result in swarms of them descending upon the unwary adventurer. They migrated to the island of Vvardenfell from parts unknown where thanks to their numbers, overwhelmed the dragon population that lived there and drove them out.[UOL 1] Due to their pest like nature, Cliff Racers were eventually driven from Vvardenfell by Saint Jiub the Eradicator, although they have been known to exist in mainland Morrowind well into the Fourth Era.
Note: the following references are not from official sources. They are included to provide a rounder background to this article, but may not reflect established lore.