The Darkening Wild
Gwaihir is Lord of the Eagles, descendent of Thorondor. He has a younger brother named Landrovar and along with his thane Meneldor, he rules the Eyrie and the lands all around.
The Windlord likely has the sharpest eyes of any living being, and nothing passes his notice for miles around. From the Eyrie itself, he is able to gaze as far as the Lonely Mountain, or the southern edge of Mirkwood.