Did Radagast Send the Eagles?

Radagast was unwittingly used by Saruman to lure Gandalf to his tower of Orthanc, where Gandalf was captured. Fortuitously, Radagast also helped rescue him by sending Gwaihir the eagle to Orthanc with news of the movements of Sauron's forces.

Who sends the Eagles in Lord of the Rings?

The Great Eagles were beings of Arda said to have been "devised" by Manwë Súlimo, leader of the Valar, and were often called the Eagles of Manwë. They were sent from Valinor to Middle-earth to keep an eye on the exiled Ñoldor, and also upon their foe the evil Vala Morgoth, and later upon Sauron.

Who sent the Eagles to Gandalf?

As instructed by Gandalf, Radagast sent Gwaihir to bear the news to him at Isengard, but Gandalf was at that time imprisoned at the pinnacle of Orthanc. On an autumn night, Gandalf saw the Eagle flying towards him and so Gwaihir rescued the Wizard.