Eagle Watching in Alton – Alton, Illinois
The Bald Eagle was adopted as the national symbol of the United States in 1782 because of its independence and strength. Measuring about 30 inches (76 cm) in length and possessing a wingspan of 72-84 inches (1.8-2.1 m), the adult eagle is easily identified by its unmistakable brown body set off by a white head and tail and bright yellow bill.
In Illinois, Bald eagles are seen primarily near large rivers, reservoirs and waterfowl refuges. They spend their days perched in large trees along shorelines, riding chunks of river ice, searching for fish churned up by river vessels or dams, and kettling (soaring) the thermals. In the late afternoons and at night they usually retreat into sheltered valleys and ravines. In the winter, eagles will roost communally in contrast to the territorial nature they exhibit during the breeding season. If an eagle builds a nest, it will stay in the area and won’t migrate back north. Currently in Illinois there are approximately 40 active nests compared to 6 in 1990. There is one known active nest the the Meeting of the Great Rivers Scenic Byway area which is located in the Two Rivers National Wildlife Refuge.
Bald Eagles are also known as "baseballs" by experienced eagle watchers because from a distance that’s what the eagle’s white head looks like. It’s amazing how an experienced eagle watcher can spot eagles from a distance. When searching for Bald Eagles look for the white "baseballs" in the trees along the river.
With more than 40 miles of pristine shoreline, the Middle Mississippi River Valley is a picturesque spot in which to view bald eagles. Beginning in December, more than 2,000 eagles migrate to the region, returning to their winter home along the bluffs of the Great River Road. Good places to view the proud birds include the Melvin Price Locks and Dam, the Alton Lake section of the Mississippi River and Pere Marquette State Park. Several towns and state parks host special eagle observation programs and exhibits throughout the prime winter viewing season.
Location: Route 100, Alton, IL 62002
Phone: 800-258-6645

An excellent post. From Christmas to the end of February Alton, Illinois area boasts more American Bald Eagles than any other palce outside Alaska. There are Eagle Watching Packages available at many area many area bed and breakfasts and motels, Eagle Meet & Greet at the Alton Convention and Visitors Center, and Bald Eagle Days at Pere Marquette State Park. You owe it to yourself to explore the area and enjoy these majestic creatures.