Immature eagles' feet are yellow, but unlike the adults, their bills and eyes are brown. Thus, it is easy to confuse immature bald eagles with large hawks or golden eagles. Bird identification guides describe ways to tell these birds apart. Food Bald eagles feed primarily on fish. In Wisconsin, the most important species are suckers, northern pike, muskellunge and bullheads.
Eagles scavenge dead fish along shorelines and capture live ones with their feet.
Their talons are strong and sharp, good for grasping prey. Occasionally, eagles eat waterbirds or mammals. Often these are carrion, like roadkilled deer. Breeding Biology Bald eagles are sexually mature when four or five years old. During the breeding season, bald eagles establish and defend territories.