Mearas in the New Line film
Royal Horses of Rohan. The mearas had the gift of great speed. Only the royalty could ride them. The mearas were descended from swift horses of the Valar Orome. Their ancestor was Felarof, a horse who was originally wild but was tamed by Eorl, first King of Rohan. Gandalf tamed their King, Shadowfax, and became the first and only wizard to ride a mearas. They fought together in the war of the ring and the two later went to the Undying Lands across the sea.