Here are some of the interesting statistics from Mark Stalmaster's book, The Bald Eagle, published in 1987. The following were some major food sources of nesting Bald Eagles:
In North Central Minnesota - Bullheads (35%), suckers (29%), and northern pike (14%)
In Louisiana - Catfish and coots (42%), waterfowl (16%), muskrats, nutria (also known as the river rat.)
In Northern Idaho - Yellow perch (72%), an all-fish diet.
Klamath Lake Oregon - Grebes, ducks, chubs, and suckers were most common. 13 birds, 8 fish, and 5 mammal species.
Yellowstone National Park - Various waterfowl species, cutthroat trout, 3 fish, 9 bird, and 4 mammal species.
Southeastern Alaska, 1955 - Salmon, trout, pollack, and cod (34%), a large diversity of prey and carrion.
Southeastern Alaska, 1975 - Salmon, trout, and herring, majority of prey items.
North Central Florida - Brown bullheads and blue & white catfishes (59%, American coots (19%), a total of 10 fish, 12 bird, and 9 mammal species.