Bald Eagles nests are among the largest of all birds. One nest in Ohio, used for 34 years, weighed almost 2 metric tons. A Florida nest was 2.9 meters in diameter and 6.1 meters tall. Typical nests are just over 1.5 meters around and about a meter tall (Buehler 2000).
We photographed this nesting eagle yesterday at the Carpenter Nature Center in nearby Washington County, Minnesota. The frozen St. Croix River is in the background.