Radagast the Brown

Radagast the Brown was one of the five members of the White Council.  He was of the race of Istari, who came from Valar to aid in the struggles of Men and Elves and other good races agains the evil of Melkor.

Radagast's primary concern was with nature, with birds and trees and living things.  He kept to himself for the most part, and dwelt with the animals of the forest.  In concerning himself so much with the animals, however, he neglected his greater duty to the Men and Elves.  In this he was foolish; but he did not turn to the Power of Sauron, as did Saruman.

Radagast had a hand in the rescue of Gandalf from the tower of Orthanc, for it was he who sent the great Eagle Gwaihir Windlord to seek word from Saruman.  Gwaihir rescued Gandalf, who was able to return to Rivendell in time to take part in the rescue of Frodo from the Ring-wraiths.