A mythological bird which was believed to live in the area of the Indian Ocean. Its name is sometimes spelled "rukh".

According to "The Thousand Nights and a Night," the roc was so large and powerful that it could carry a full-grown elephant or rhinoceros in each claw. A person's weight was so negligible that the roc wouldn't even notice if someone hitched along for a ride. The roc's egg was so colossal that it could be mistaken for a domed building made of ivory or alabaster.

Marco Polo claimed that the roc was native to Madagascar, but that's an awfully small island for such an awfully big bird.