This morning, after breakfast, I looked out the parlor window. Common mergansers dived for fish in the open water at the mouth of Esopus Creek. In a nearby treetop, a bald eagle watched the waterfowl with interest. Barely visible in a tree in the south cove, a second adult bald eagle perched. Then, a third eagle appeared, an immature one, circling briefly over the cove before flying down river.