Each winter, bald eagles gather in the Sauk Prairie area due to a unique combination of factors. For winter survival, eagles need open water for fishing, undeveloped shoreline with large trees for perching, and sheltered valleys for night-time roosting.
Bald Eagle Watching Days
Eagle watching is best during the morning when the birds are most active fishing and are frequently seen perching in trees along the river. Spotting scopes are available for your use at Ferry Bluff Eagle Council’s Overlook in Prairie du Sac.
More info here.