In the eastern United States, a dozen Cygnus buccinator herbivores want to teach them how to migrate in autumn. They are birds prisoners and when they were released in nature they did not know how and where they were going to migrate.
As teachers have used the delta motor fin and as they are accustomed since childhood to engine noise have traveled 160 kilometers.
Next year the tour will be longer and will head to Canada. From there, swans will only have to walk in their natural environment, without the help of man.