Migrating Swans Van Williamson documents the efforts of a group of environmentalists and scientists to reestablish the trumpeter swan as a migratory species in the Chesapeake region...by teaching them how to migrate. The group tried to teach an experimental group of seven birds in central Virginia to follow a leader to the Eastern Shore of the Chesapeake Bay in Maryland. The birds were "imprinted" from the time they were in the egg to want to follow a biologist with an ultralight aircraft. The ultralight's engine was run near the eggs so that the birds would be used to hearing the sound of the engine, and would find it comforting and familiar. When the cygnets were hatched, their first sensory input was of the biologist who ultimately guided the ultralight to the birds' destination. Three birds made the flight. Though the scientists are hopeful, it will be years before they know if the experiment will ultimately succeed in expanding the range of trumpeter swans.