An eagle from the Misty Mountains who helped Gandalf before and during the War of the Ring; his name means Windlord in Sindarin, and he is said to have been a descendant of Thorondor and the greatest and the swiftest of the Eagles of the North by the end of the Third Age. When the Eagles heard about Gollum's escape from Mirkwood, they sent Gwaihir to bear the news to Isengard, as they had been told by Radagast; the eagle espied Gandalf imprisoned upon the top of the tower and carried him to Edoras. Next time, Gwaihir was sent to seek for Gandalf by Galadriel; he found the wizard, who had recently defeated the Balrog, upon the summit of Celebdil and took him to Lothlórien. Upon Gandalf's orders, Gwaihir watched the river Anduin and brought him news about the Company of the Ring. The eagle participated in the Battle of the Morannon, and when Mount Doom erupted, he carried Gandalf to it, in order to save Frodo and Sam.