Mighty Eagle appears as an enormous white and dark brown round bird with a large beak in a small curl tip and has three large black feathers on top of his head. His eyes are black and has thick brows on each side of his eyes. He also has purple eyebags under both of his eyes and has a large black feathers on his back.
In his appearance in Toons and Epic, Mighty Eagle's feathers are brown and his thick brows are now smaller and his eyebags are magenta.
In the film version, Mighty Eagle appears as a giant white and dark brown anthropomorphic Bald Eagle with muscular and fat build and is identical to his game counterpart but with minor changes. He has a large dark brown feathered arms which he uses for flight and does not have the three black feathers on top of his head. He also has an orange feet with black claws and has large black feathers on his back. His thick brows are now messier like his game counterpart, his large beak has maintained but the back of his beak was curled when he smiles arrogantly and his eyebags are now magenta like his Toons appearance.
Mighty is a very wise and powerful bird who is greatly respected by the birds. He is also happy when he gives a candy to the Blues during Hamoween.
In the film version, Mighty is different than his game counterpart who is wise to all the birds, he appears as somewhat of a celebrity jock who had many trophies and other things due to his heroism to protect the birds in Bird Island. He is initially lazy as seen in the movie before he shows his bravery to save the eggs.