SHEPHERDSTOWN — Shade your eyes. Crane your neck and look up high into a tree at a very large bird nest constructed of sticks, branches and pieces of wood. You can’t see the inside of the nest, but it is lined with softer materials such as moss or tree leaves. At the U.S. Fish and Wildlife Services National Conservation Training Center, just outside Shepherdstown, are bald eagles. At the U.S. Fish and Wildlife Services National Conservation Training Center, just outside Shepherdstown, are bald eagles. Courtesy photo They are not raising young at this time of the year. But they usually stay around the area because of the Potomac River and its revived waters now providing the large birds with fish and even mammals that live near it. In many years, the adult eagles lay two or three eggs and brood them for about 35 days before they hatch. In recent years, the eggs have hatched during the cold of February. And snows and cold temperatures worsened by steady winds have killed the young eaglets. If the young do survive the cold and damp weather, they will attempt their first flights in 10 to 12 weeks. Many times, if eggs hatch at three or four day intervals, only the larges...